the largest container port serving southern China and one of the busiest ports in the world. Some 456,000 vessels arrived in and departed from Hong Kong during the year, carrying 243 million tonnes of cargo and about 25 million passengers. The average turnaround time for container vessels in Hong Kong is about 10 hours. For conventional vessels working in mid-stream at buoys or anchorages, it is 42 and 52 hours respectively. Container Port traffic The port has been one of the busiest container ports in the world for many years, and at times the busiest. It was the world's busiest container port from 1987 to 1989, from 1992 to 1997, and from 1999 to 2004. The amount of container ships that went through Hong Kong's container port was 25,869 in 2016, with a net register tonnage of 386,853 tonnes in 2016. Container terminals There are currently nine container terminals situated at Kwai Chung, Stonecutters Island and Tsing Yi (the last one completed in 2004). Substantial container throughput is handled by the River Trade Terminal at Tuen Mun and by mid-stream. Kwai Tsing Container Terminals The Kwai Tsing Container Terminals (Kwai Chung Container Terminals until Container Terminal 9 was opened on Tsing Yi), located in the north-western part of the harbour, has nine container terminals with 24 berths of about 8,500 metres of frontage. It covers a total terminal area of about 2.7 km² which includes container yards and container freight stations. The nine container terminals have a total handling capacity of over . These terminals are operated by five companies, namely: Modern Terminals Ltd. (MTL) Hongkong International Terminals Ltd. (HIT) COSCO Information & Technology (H.K.) Ltd. (COSCO) Dubai Port International Terminals Ltd. (DPI) Asia Container Terminals Ltd. (ACT) The existing 9 terminals occupy 2.17 square kilometres of land, providing 18 berths and 6,592 metres deep water frontage. These terminals handle about 60% of total container traffic handled in Hong Kong. In July, 2020, The Port of Hong Kong welcomed HMM Gdansk, the world’s largest container vessel, on its maiden call to Hong Kong at Kwai Tsing Container Terminal 7. Planning is underway for a potential Container Terminal 10 (CT10), with possible sites narrowed down to either southwest Tsing Yi or northwest Lantau, to the west of the airport. River Trade Terminal at Tuen Mun The River Trade Terminal at Tuen Mun involves the consolidation of containers, break bulk and bulk