Jiamin line, Airport link line and Lianggang Express line—are under construction. Air and sea Shanghai is one of the largest air transportation hubs in Asia. The city has two commercial airports: Shanghai Pudong International Airport and Shanghai Hongqiao International Airport. Pudong International Airport is the primary international airport, while Hongqiao International Airport mainly operates domestic flights with limited short-haul international flights. In 2018, Pudong International Airport served 74.0 million passengers and handled 3.8 million tons of cargo, making it the ninth-busiest airport by passenger volume and third-busiest airport by cargo volume. The same year, Hongqiao International Airport served 43.6 million passengers, making it the 19th-busiest airport by passenger volume. Since its opening, the Port of Shanghai has rapidly grown to become the largest port in China. Yangshan Port was built in 2005 because the river was unsuitable for docking large container ships. The port is connected with the mainland through the long Donghai Bridge. Although the port is run by the Shanghai International Port Group under the government of Shanghai, it administratively belongs to Shengsi County, Zhejiang. Overtaking the Port of Singapore in 2010, the Port of Shanghai has become world's busiest container port with an annual TEU transportation of 42 million in 2018. Besides cargo, the Port of Shanghai handled 259 cruises and 1.89 million passengers in 2019. Shanghai is part of the 21st Century Maritime Silk Road that runs from the Chinese coast to the south via the southern tip of India to Mombasa, from there to the Mediterranean, there to the Upper Adriatic region to the northern Italian hub of Trieste with its rail connections to Central and the Eastern Europe. Culture The culture of Shanghai was formed by a combination of the nearby Wuyue culture and the "East Meets West" Haipai culture. Wuyue culture's influence is manifested in Shanghainese language—which comprises dialectal elements from nearby Jiaxing, Suzhou, and Ningbo—and Shanghai cuisine, which was influenced by Jiangsu cuisine and Zhejiang cuisine. Haipai culture emerged after Shanghai became a prosperous port in the early 20th century, with numerous foreigners from Europe, America, Japan, and India moving into the city. The culture fuses elements of Western cultures with the local Wuyue culture, and its influence extends to the city's literature, fashion, architecture, music, and cuisine. The term Haipai—originally referring to a painting school in Shanghai—was coined by a group of Beijing writers in 1920 to criticize some Shanghai scholars