He admitted to dating the Chinese blogger last June and have since been openly expressing their affections for each other. They were even spotted together in Tokyo, Japan earlier this year, with some wondering if this signals that the pair is ready for the next stage of their relationship.
Show, who was in Shenyang, China for a concert, posted a simple message, "Happy birthday, Boss chow," on his Weibo account after he got off stage, with fans poking fun at him publishing his post a minute before her actual birthday - 11.59pm on Sep 11.
He also updated his account with not one, but two pictures of himself on her special day, with one of them mimicking a shot she previously took. In addition, he was wearing the clothing brand that Grace endorses. His fans have remarked that it seems like true love for him and wondered when the couple will have marriage news to share.