Twitter is blocked in China and only people with a VPN-type workaround can access it.
However, many Chinese diplomats and official state media have accounts to defend China's point of view.
Peng, a former Wimbledon and French Open doubles champion, took to Chinese social media in early November to allege that former vice-premier Zhang Gaoli – who is in his 70s – forced her into sex during an on-off relationship spanning several years.
Her message was quickly scrubbed from the Chinese web, but not before screenshots were posted on Twitter, sparking a worldwide outcry.
The Women's Tennis Association has called for Peng's allegations to be investigated fully and transparently.
The sporting body announced earlier this month that it was suspending all tournaments in China, including Hong Kong, over concerns about Peng's safety.
State media have previously published other images of Peng at a Beijing tennis tournament as well as a screenshot of an email allegedly written by the player saying "everything is fine".
Peng also participated in late November in a 30-minute video call with Thomas Bach, head of the International Olympic Committee.
But the WTA and fellow tennis players have continued to call for more transparency from Beijing over Peng's whereabouts.