A Chinese law enforcement vessel leaves the waters of Muang Mo of Laos upon completion of its mission, on Nov. 21, 2019. The 88th joint patrol on the Mekong River led by China, Laos, Myanmar and Thailand was completed Friday. Eight vessels and 228 law enforcement personnel from the four countries participated in the four-day mission aimed at enhancing security along the Mekong River. (Xinhua/Wu Han)