People view tea pots at Inner Mongolia International Convention & Exhibition Center in Hohhot, north China's Inner Mongolia Autonomous Region, May 24, 2019. The 7th Hohhot tea industry expo kicked off here on Friday, attracting over 400 tea merchants and enterprises. (Xinhua/Wang Jing)

A tea merchant sells tea at Inner Mongolia International Convention & Exhibition Center in Hohhot, north China's Inner Mongolia Autonomous Region, May 24, 2019. The 7th Hohhot tea industry expo kicked off here on Friday, attracting over 400 tea merchants and enterprises. (Xinhua/Wang Jing)

People enjoy tea at Inner Mongolia International Convention & Exhibition Center in Hohhot, north China's Inner Mongolia Autonomous Region, May 24, 2019. The 7th Hohhot tea industry expo kicked off here on Friday, attracting over 400 tea merchants and enterprises. (Xinhua/Wang Jing)