People enjoy a hot-spring bath at a hot spring scenic spot in Beibei District of southwest China's Chongqing, Dec. 14, 2018. The local hot spring scenic spots attract more customers in winter. (Xinhua/Qin Tingfu)

People enjoy a hot-spring bath at a hot spring scenic spot in Beibei District of southwest China's Chongqing, Dec. 14, 2018. The local hot spring scenic spots attract more customers in winter. (Xinhua/Qin Tingfu)

People enjoy a hot-spring bath at a hot spring scenic spot in Beibei District of southwest China's Chongqing, Dec. 14, 2018. The local hot spring scenic spots attract more customers in winter. (Xinhua/Qin Tingfu)

People enjoy a hot-spring bath at a hot spring scenic spot in Beibei District of southwest China's Chongqing, Dec. 14, 2018. The local hot spring scenic spots attract more customers in winter. (Xinhua/Qin Tingfu)

A woman enjoys a hot-spring bath at a hot spring scenic spot in Beibei District of southwest China's Chongqing, Dec. 14, 2018. The local hot spring scenic spots attract more customers in winter. (Xinhua/Qin Tingfu)

People enjoy a hot-spring bath at a hot spring scenic spot in Beibei District of southwest China's Chongqing, Dec. 14, 2018. The local hot spring scenic spots attract more customers in winter. (Xinhua/Qin Tingfu)