Officials, experts discuss issues raised in Western media By WANG XIAOYU and ZHANG ZHIHAO | China Daily | Updated: 2021-07-23 07:40 Share CLOSE Liang Wannian, a Tsinghua University professor who heads the Chinese team of the joint mission. [Photo provided to China Daily] Officials and experts attending Thursday's news conference also commented on a number of issues that have been raised in Western media. Data sharing China had presented sufficient data in accordance with requests by experts from the World Health Organization's mission to China on the origins of the COVID-19 virus, said Liang Wannian, the team leader of the Chinese side of the China-World Health Organization joint expert team.