A cargo flight of Hainan Airlines is seen at Haikou Meilan International Airport in Haikou, south China's Hainan Province, March 26, 2021. China's southern tropical province of Hainan on Saturday launched a Haikou-Paris air freight route to serve international cargo transport of its free trade port. An outbound cargo flight carrying 35 tonnes of goods left Haikou for Paris on Saturday morning. (Photo: www.news.cn)

Goods are loaded on a cargo plane of Hainan Airlines at Haikou Meilan International Airport in Haikou, south China's Hainan Province, March 26, 2021. China's southern tropical province of Hainan on Saturday launched a Haikou-Paris air freight route to serve international cargo transport of its free trade port. An outbound cargo flight carrying 35 tonnes of goods left Haikou for Paris on Saturday morning. (Photo: www.news.cn)

A crew member prepares the flight of a cargo plane of Hainan Airlines at Haikou Meilan International Airport in Haikou, south China's Hainan Province, March 26, 2021. China's southern tropical province of Hainan on Saturday launched a Haikou-Paris air freight route to serve international cargo transport of its free trade port. An outbound cargo flight carrying 35 tonnes of goods left Haikou for Paris on Saturday morning. (Photo: www.news.cn)

A staff member fixes the goods aboard a cargo plane of Hainan Airlines at Haikou Meilan International Airport in Haikou, south China's Hainan Province, March 26, 2021. China's southern tropical province of Hainan on Saturday launched a Haikou-Paris air freight route to serve international cargo transport of its free trade port. An outbound cargo flight carrying 35 tonnes of goods left Haikou for Paris on Saturday morning. (Photo: www.news.cn)

Goods are loaded on a cargo plane of Hainan Airlines at Haikou Meilan International Airport in Haikou, south China's Hainan Province, March 26, 2021. China's southern tropical province of Hainan on Saturday launched a Haikou-Paris air freight route to serve international cargo transport of its free trade port. An outbound cargo flight carrying 35 tonnes of goods left Haikou for Paris on Saturday morning. (Photo: www.news.cn)

Staff members fix the goods aboard a cargo plane of Hainan Airlines at Haikou Meilan International Airport in Haikou, south China's Hainan Province, March 26, 2021. China's southern tropical province of Hainan on Saturday launched a Haikou-Paris air freight route to serve international cargo transport of its free trade port. An outbound cargo flight carrying 35 tonnes of goods left Haikou for Paris on Saturday morning. (Photo: www.news.cn)