The formation of Chinese and Thai naval ships sails in waters against the wind and waves on May 8, 2019. China and Thailand's naval forces on Wednesday concluded a week-long joint training exercise at a military port in Zhanjiang, South China's Guangdong province. [Photo/China News Service]

The formation of Chinese and Thai naval ships sails in waters against the wind and waves on May 8, 2019. [Photo/China News Service]