Girl groups f(x)'s member Amber and miss A's member Fei revealed their friendship.

On August 12, Fei posted on her Instagram a photo.

In the picture, Amber was smiling like a little kid and Fei was showing off her bright red lips. The two are in the 'China line' of Chinese members in Korean idol groups.

Internet users who saw this commented, "I love both Amber and Fei," "Amber is close to so many people," and "Fei is so pretty."