Former F4 member Ken Chu has apologised for the snarky remarks he had made about Mayday's Ashin.

The comments seemingly took place during the recent F4 reunion tour, which the 46-year-old was conspicuously absent from.

The remaining three members — Vic Chou, Jerry Yan and Vanness Wu — embarked on the tour starting Dec 19, with Ashin, 50, and Jay Chou as guests.

On Ashin's final day on tour, Dec 22, fans shared footage of him saying that Ken was only unable "to make it temporarily" and that he would try his best to make a full reunion happen.

Ashin is a shareholder in B'in Music, Mayday's record label, which is also handling F4's tour. Ken recently had disagreements with B'in Music.

Ken appeared to shoot back in a fan group: "He’s said so several times already, but I haven’t received any information on my end at all."

He also told fans that it was merely "polite talk" and to let it go.

Ken last reunited with the other F4 members back in Julyduring the finale of Mayday's tour, which sparked hope that they would have their own reunion tour. 

In September, however, rumours spread that the F4 reunion was jeopardised due to an internal feud among members and Ken's refusal to take part.