Super Junior's Choi Si Won was all about exercising today as he joined a couple of his buddies for some mountain biking. Choi tweeted a friendly photo with his friends smiling bright for the camera. He and Domino posed on their bikes dressed in gray athletic gear, while the third man stands by their side giving them moral support.

"[I'm] riding up to the Peak with Domino," he tweeted as the photo's caption.

The King Of Dramas actor also invited ELFs to the grand opening of a new apparel store in China. He hinted that he will make an appearance at the big event. 

Choi: "Helianthus Hongkong store opening! Nov 6, 2:30pm, Ocean Terminal Main Concourse, Let's have fun with me :^)"

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Choi Si Won plans to continue to make a big splash in China by starring in the historical action film Dragon Blade. The movie, which is slated for February 15 release, also stars top actors Jackie Chan, Adrien Brody, and John Cusack. The story is about an enslaved Chinese commander and Roman general joining forces to fight.