Yuyao (simplified Chinese: 余姚; traditional Chinese: 餘姚; pinyin: Yúyáo) is a county-level city in the northeast of Zhejiang province, China. It is under the jurisdiction of the sub-provincial city of Ningbo. It is located 40 km (25 mi) west of central Ningbo, 120 km (75 mi) east of Hangzhou, bordering Hangzhou Bay in the north. Yuyao covers an area of 1,527 km2 (590 sq mi). As of the 2020 census, its population was 1,254,032. Its built-up (or metro) area with the county-level city of Cixi largely conurbated, had 3,083,520 inhabitants.[2] However, recently the migrated workers and their families have increase the total population to about 1.6 million, but they do not show up in the official census and other related statistics data.