The account by the party's youth wing made its debut on Friday with a chirpy one-liner - "I'm here!"
It has posted more than dozen times since then - in Chinese - covering patriotic topics like the anniversary of the Japanese invasion in 1931 and links to state media articles.
But the posts have been met with a deluge of abusive tweets and questions about how the account has managed to circumvent the "Great Firewall" surrounding China's internet and accusing the youth wing of hypocrisy.
'Go back behind the firewall'
China closely controls what can be posted and seen online, and is steadily tightening its restrictions.
To get round this, Chinese users have always used VPNs to access Twitter and other banned sites by making it seem like their device is in another country.