2b:null 2c:["$","title",null,{"children":"Zoomable Circle Packing - 2010 Chinese population - Residence and household registration | Taylor Johnston | Observable"}] 31:T553,md`# Zoomable Circle Packing - 2010 Chinese population - Residence and household registration Data source: National Bureau of Statistics of China (http://www.stats.gov.cn/) China 2010 Census Data, Part 1 All Data -> Volume 1 Summary -> 1-2 Gender and household registration by region Status of the population #### Descriptions In China, everyone has its own household registration, names "Hukou", which is something like a passport of a city or county. And it is inherited from parents. For example, a girl was born, her mother's "Hukou" is Beijing(the capital of China), her father's "Hukou" is Panjin(which is a small county in north of China), then the girl's "Hukou" can be Beijing or Panjin, the parents should choose one and register it. In China, to have a "Hukou" of a city means you can use the education, medical and other resources of this city for free or spend less money, the bigger the city, the more public resources you can use. So it is not difficult to choose in this example, the parents must choose Beijing as the girl's "Hukou". You may astonished by people need a passport inside the country. it is because lots of people live at big cities amount China, and the publich resources espically for education in these cities are not enought support so many people. So those in power chose to tilt public resources to the locals. #### Legend`32:T53c,html`

Local Residence The person who has local "Hukou" and live in the local.
Living Outside The place the person live in, is different from his/her "Hukou".
Pending The person has not register his/her "Hukou".
Living Abroad Person who lived abroad.

`33:Te54,chart = { const root = pack(getJsonData()); // start to calculate let focus = root; let view; updateLegend(); // create svg under main div const svg = d3.create("svg") .attr("viewBox", `-${width / 2} -${height / 2} ${width} ${height}`) .style("display", "block") .style("margin", "0 -14px") .style("background", color(0)) .style("cursor", "pointer") .on("click", (event) => zoom(event, root)); // draw circles const node = svg.append("g") .selectAll("circle") .data(root.descendants().slice(1)) .join("circle") .attr("fill", d => { if (d.data.name_pinyin == "Local residence") { return colorLocalResidence; } else if (d.data.name_pinyin == "Living outside") { return colorLivingOutside; } else if (d.data.name_pinyin == "Pending") { return colorPending; } else if (d.data.name_pinyin == "Living abroad") { return colorLivingAbroad; } else { return color(d.depth); } }) .attr("pointer-events", d => !d.children ? "none" : null) .on("mouseover", function () { d3.select(this).attr("stroke", "#000"); }) .on("mouseout", function () { d3.select(this).attr("stroke", null); }) .on("click", (event, d) => focus !== d && (zoom(event, d), event.stopPropagation())); // draw label for each circle const label = svg.append("g") .style("font", "10px sans-serif") .attr("pointer-events", "none") .attr("text-anchor", "middle") .selectAll("text") .data(root.descendants()) .join("text") .style("fill-opacity", d => d.parent === root ? 1 : 0) .style("display", d => d.parent === root ? "inline" : "none") .text(d => { if (d.data.name_pinyin == "Local residence" || d.data.name_pinyin == "Living outside" || d.data.name_pinyin == "Pending" || d.data.name_pinyin == "Living abroad") { return d.data.name_pinyin + ":" + d.data.value; } else { return d.data.name_pinyin; } }) .attr("font-size","18px") .style("fill", "#004669"); zoomTo([root.x, root.y, root.r * 2]); function zoomTo(v) { const k = width / v[2]; view = v; label.attr("transform", d => `translate(${(d.x - v[0]) * k},${(d.y - v[1]) * k})`); node.attr("transform", d => `translate(${(d.x - v[0]) * k},${(d.y - v[1]) * k})`); node.attr("r", d => d.r * k); } function zoom(event, d) { const focus0 = focus; var focus = d; const transition = svg.transition() .duration(event.altKey ? 7500 : 750) .tween("zoom", d => { const i = d3.interpolateZoom(view, [focus.x, focus.y, focus.r * 2]); return t => zoomTo(i(t)); }); label .filter(function (d) { return d.parent === focus || this.style.display === "inline"; }) .transition(transition) .style("fill-opacity", d => d.parent === focus ? 1 : 0) .on("start", function (d) { if (d.parent === focus) this.style.display = "inline"; }) .on("end", function (d) { if (d.parent !== focus) this.style.display = "none"; }); } return svg.node(); }34:T6e8f,function getJsonData() { return { name: "全国", name_pinyin: "Nationwide", isProvince: "false", value: "1332810869", children: [ { name: "北京", name_pinyin: "BeiJing", isProvince: "true", value: "19612368", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "50000", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "10498288", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "120250", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "120", children: [] } ] }, { name: "天津", name_pinyin: "TianJing", isProvince: "true", value: "12938693", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "7912258", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "4952225", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "56773", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "17437", children: [] } ] }, { name: "河北", name_pinyin: "HeBei", isProvince: "true", value: "71854210", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "62987340", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "8297279", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "549998", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "19593", children: [] } ] }, { name: "山西", name_pinyin: "ShanXi", isProvince: "true", value: "35712101", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "28640978", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "6764665", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "300661", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "5797", children: [] } ] }, { name: "内蒙古", name_pinyin: "NeiMengGu", isProvince: "true", value: "24706291", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "17389253", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "7170889", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "134459", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "11690", children: [] } ] }, { name: "辽宁", name_pinyin: "LiaoNing", isProvince: "true", value: "43746323", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "34172463", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "9310058", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "159026", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "104776", children: [] } ] }, { name: "吉林", name_pinyin: "JiLin", isProvince: "true", value: "27452815", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "22617333", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "4462177", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "90876", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "282429", children: [] } ] }, { name: "黑龙江", name_pinyin: "HeiLongJiang", isProvince: "true", value: "38313991", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "32508828", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "5557828", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "123130", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "124205", children: [] } ] }, { name: "上海", name_pinyin: "ShangHai", isProvince: "true", value: "23019196", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "10142052", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "12685316", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "75231", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "116597", children: [] } ] }, { name: "江苏", name_pinyin: "JiangSu", isProvince: "true", value: "78660941", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "59693914", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "18226819", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "597379", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "142829", children: [] } ] }, { name: "浙江", name_pinyin: "ZheJiang", isProvince: "true", value: "54426891", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "33976850", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "19900863", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "383252", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "165926", children: [] } ] }, { name: "安徽", name_pinyin: "AnHui", isProvince: "true", value: "59500468", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "51501605", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "7100608", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "873043", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "25212", children: [] } ] }, { name: "福建", name_pinyin: "FuJian", isProvince: "true", value: "36894217", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "24864626", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "11074525", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "587028", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "368038", children: [] } ] }, { name: "江西", name_pinyin: "JiangXi", isProvince: "true", value: "44567797", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "38468867", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "5302276", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "785230", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "11424", children: [] } ] }, { name: "山东", name_pinyin: "ShanDong", isProvince: "true", value: "95792719", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "81179825", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "13698321", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "814595", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "99978", children: [] } ] }, { name: "河南", name_pinyin: "HeNan", isProvince: "true", value: "94029939", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "83362187", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "9764067", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "867230", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "36455", children: [] } ] }, { name: "湖北", name_pinyin: "HuBei", isProvince: "true", value: "57237727", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "47349628", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "9250228", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "610599", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "27272", children: [] } ] }, { name: "湖南", name_pinyin: "HuNan", isProvince: "true", value: "65700762", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "57153579", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "7898815", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "628595", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "19773", children: [] } ] }, { name: "广东", name_pinyin: "GuangDong", isProvince: "true", value: "104320459", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "65828074", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "36806649", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "1537199", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "148537", children: [] } ] }, { name: "广西", name_pinyin: "GuangXi", isProvince: "true", value: "46023761", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "38793142", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "6291811", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "914848", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "23960", children: [] } ] }, { name: "海南", name_pinyin: "HaiNan", isProvince: "true", value: "8671485", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "6661050", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "1843430", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "159072", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "7933", children: [] } ] }, { name: "重庆", name_pinyin: "ChongQing", isProvince: "true", value: "28846170", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "23167091", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "5440776", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "229682", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "8621", children: [] } ] }, { name: "四川", name_pinyin: "SiChuan", isProvince: "true", value: "80417528", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "67887450", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "11735152", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "766368", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "28558", children: [] } ] }, { name: "贵州", name_pinyin: "GuiZhou", isProvince: "true", value: "34748556", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "29403067", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "4629542", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "711251", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "4696", children: [] } ] }, { name: "云南", name_pinyin: "YunNan", isProvince: "true", value: "45966766", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "39295800", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "6053805", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "578461", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "38700", children: [] } ] }, { name: "西藏", name_pinyin: "XiZang", isProvince: "true", value: "3002165", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "2691210", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "262005", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "48587", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "363", children: [] } ] }, { name: "陕西", name_pinyin: "ShanXi", isProvince: "true", value: "37327379", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "31180416", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "5894416", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "241379", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "11168", children: [] } ] }, { name: "甘肃", name_pinyin: "GanSu", isProvince: "true", value: "25575263", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "22191912", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "3112722", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "267420", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "3209", children: [] } ] }, { name: "青海", name_pinyin: "QingHai", isProvince: "true", value: "5626723", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "4418430", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "1140954", children: [] }, { name: "户籍待定", name_pinyin: "Pending", isProvince: "false", value: "66097", children: [] }, { name: "国外居住", name_pinyin: "Living abroad", isProvince: "false", value: "1242", children: [] } ] }, { name: "宁夏", name_pinyin: "NingXia", isProvince: "true", value: "6301350", children: [ { name: "本地居住", name_pinyin: "Local residence", isProvince: "false", value: "4691550", children: [] }, { name: "外地居住", name_pinyin: "Living outside", isProvince: "false", value: "1534482", children: [] 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