A Chinese state-run broadcaster on Thursday unveiled what it says is an email from female tennis player Peng Shuai, who claimed to have an affair with a former vice premier, but doubt grew over whether it was really written by her.The official China Global Television Network posted a picture of the email on its Twitter account, as concern is mounting over her safety after she confessed an unhealthy relationship with Chinese veteran politician Zhang Gaoli early this month.CGTN released the picture of the email, purportedly sent from Peng to Steve Simon, the head of Women's Tennis Association…READ FULL ARTICLE