The medical train of the People's Liberation Army of China crosses the border with Laos by running through the Friendship Tunnel of China-Laos Railway, on July 19, 2022. A medical team of the People's Liberation Army of China has arrived in Laos to join the Lao People's Army to carry out the "Peace Train-2022" joint humanitarian medical rescue and services drills. (Photo by Kaikeo Saiyasane/Xinhua)