People select goods at a shopping fair held to greet the upcoming Spring Festival at Hunan Province Exhibition Hall in Changsha, capital of central China's Hunan Province, Jan. 15, 2020. (Xinhua/Chen Zeguo)

  People select goods at a shopping fair held to greet the upcoming Spring Festival at Hunan Province Exhibition Hall in Changsha, capital of central China's Hunan Province, Jan. 15, 2020. (Xinhua/Chen Zeguo)

  People select goods at a shopping fair held to greet the upcoming Spring Festival at Hunan Province Exhibition Hall in Changsha, capital of central China's Hunan Province, Jan. 15, 2020. (Xinhua/Chen Zeguo)

  People select goods at a shopping fair held to greet the upcoming Spring Festival at Hunan Province Exhibition Hall in Changsha, capital of central China's Hunan Province, Jan. 15, 2020. (Xinhua/Chen Zeguo)