Park Shin Hye attended the promotional launch of Korean hair care brand Ryo in China on Thursday.
Ryo, owned by Korean beauty empire AmorePacific Group, focuses on Eastern herbal ingredients such as ginseng in products like its staple shampoo and conditioner.
"Thank you to those who attended the celebratory event," said Park to her Weibo followers.
It is unknown whether Park has started to advertise Ryo, but she is a model for another cosmetics brand Mamonde, also owned by AmorePacific Group.
Park shared a selfie photo on Thursday holding a Ryo shampoo product.