"Ni hao, it's Taylor Swift. Be sure to check out my new authentic merchy [merchandise], now available in China," she says.
The clothing line will be available for purchase in China via e-commerce site JD.com next month - assuming it gets past censors.
The internet has been quick to comment on the faux-pas.
Beijing based journalist Fergus Ryan said "forget Apple & Spotify, now Tay-Tay is taking on the Chinese Communist Party".
Twitter user @metapostasy channelled Taylor Swift's song Blank Space with "I gotta a(sic) blank space, baby, and it's an accounting of Tiananmen Square in Chinese history books".
Simon Kinnear asked "how long before the first Taylor Swift fan unwittingly gets arrested while on holiday in China?".
Fans - or Swifties - have been counteracting the jokes with their excitement for the line.
"TSWIFT is finally launching a clothing line?! Debuting this summer? is this real life?! I'm so excited!" said Twitter user @JuliaMXx.
Taylor Swift is set to tour China in November, with or without her merchandise.
- AAP