Zhuhai, the core city on the west bank of the Pearl River Estuary, a special economic zone and an important city at the southern end of the Pearl River Delta, is located in the southwest of the Pearl River Estuary in Guangdong Province, with a superior geographical position. It faces Hong Kong across the sea in the east, Macau in the south, Xinhui and Taishan in the west and Zhongshan in the north. It has eight national first-class ports, including Gongbei, Jiuzhou, Zhuhai Port, Wanshan, Hengqin, Doumen, Wanchai and Zhuhai-Macao Cross-border Industrial Zone. It is the city with the largest ocean area, the largest number of islands and the longest coastline in the Pearl River Delta, and is known as the "City of Hundred Islands". Zhuhai has a beautiful ecological environment, alternating mountains and rivers, opposite land and island, and a pleasant climate. It is the only city in China that has been selected as one of the "Top 40 National Tourist Attractions" with its overall urban landscape. The living environment is first-class. Zhuhai is one of the first four special economic zones in China to implement the policy of opening to the outside world, with a land area of 170 1 km2 and a registered population of 106.0 1 10,000 (201end of the year). It is a prefecture-level city with the least population in Guangdong Province. 20 13 China urban sustainable development index report Zhuhai ranks first in the country, and Zhuhai is one of the top 50 emerging cities in China, a new garden city; Zhuhai is a newly promulgated "city of happiness" and has the title of "city of romance".