A crane loads containers carrying supplies for Hong Kong at Pinghu South Railway Station in Shenzhen, south China's Guangdong Province, March 1, 2022. A special freight train will start operation on Wednesday to stabilize mainland supply of goods to Hong Kong amid the COVID-19 epidemic. (Xinhua/Liang Xu)

　　A crane loads containers carrying supplies for Hong Kong at Pinghu South Railway Station in Shenzhen, south China's Guangdong Province, March 1, 2022. A special freight train will start operation on Wednesday to stabilize mainland supply of goods to Hong Kong amid the COVID-19 epidemic. (Xinhua/Liang Xu)

　　A crane loads containers carrying supplies for Hong Kong at Pinghu South Railway Station in Shenzhen, south China's Guangdong Province, March 1, 2022. A special freight train will start operation on Wednesday to stabilize mainland supply of goods to Hong Kong amid the COVID-19 epidemic. (Xinhua/Liang Xu)

　　Customs staff check supplies for Hong Kong in Shenzhen, south China's Guangdong Province, March 1, 2022. A special freight train will start operation on Wednesday to stabilize mainland supply of goods to Hong Kong amid the COVID-19 epidemic. (Xinhua/Liang Xu)