What can you say about the accusation against Chinese chess players which allegedly smeared their faces with some tonics at the last Olimpiad?

• 上届奥赛中对于中国队员在脸上涂抹一些滋补品有一些指责，您怎么看？[有人知道内幕不？是不是清凉油？我知道有些外国人据说受不了那个味道