leisure facilities. It will epitomize the natural beauty and cultural richness of the city. S1 Rail Line Corridor The line is 41 km long and will be completely constructed underground with 28 stops. The line will pass by all the major zones of the city and will significantly alleviate local traffic congestion. The project will be integrated with the surface transportation system and serve as a strong boost to the city’s renewal. Geography Topography The area is relatively flat, but there is a gentle slope stretching from the south-east to north-west. The northern part consists of dense polder, while the southern part is dotted with various lakes. The major lakes are Dianshan Lake, Yangcheng Lake, Cheng Lake and Kuilei Lake. The Wusong River winds through the city, while smaller rivers criss-cross it in a grid pattern. Climate According to an analysis of the local meteorological bureau, from 1961 to 2008, the annual and seasonal air temperatures were the increasing trends, especially in spring. The total precipitation remained static relatively, however, much concentrated in summer and winter. Economy The composition of local GDP have changed drastically since 1978. In 1978, the primary sector, the secondary sector and the tertiary sector accounted for 51.4%, 28.9% and 19.7% of Kunshan's GDP, respectively. However, in 2015, the primary sector only accounted for 0.9% of Kunshan's GDP, while the secondary sector accounted for 55.1% and the tertiary sector accounted for 44.0%. Kunshan is also home to over 1,000 hi-tech companies that have helped shape the city’s four economic pillars—optoelectronics, semiconductors, intelligent manufacturing, and RNAi and biomedicine. The total GDP of Kunshan was 316 billion RMB, the highest of any Chinese county-level city in 2016. Kunshan is also home to many Taiwanese who have invested over the decades since China's opening up to the world in the late 70s. Kunshan is also known as "Little Taiwan" because of the large Taiwanese community there. In 2020, there were more than 100,000 Taiwanese people in Kunshan. The Chinese subsidiary of American Megatrends, American Megatrends Information Technology (Kunshan) Co., Ltd. (安迈信息科技（昆山）有限公司), has its headquarters in Kunshan. Culture Kunqu Opera Kunshan is the origin of Kunqu, also known as Kunqu opera. Kunqu is one of the oldest extant forms of Chinese opera. It evolved from the local melody of Kunshan, and subsequently came to dominate Chinese theater from the 16th to the 18th centuries. Today, Kunqu is performed in many