Kim will appear in an ad for Chinese health supplement company Nature's Bounty. Tang Wei has already been working on the same ad.
For the first shoot scheduled next month, Kim will not be joining Tang, Kim's agency said.
Both, however, are expected to hold promotion events together soon. The exact plans have not been determined, the agency added.
Meanwhile, Kim has returned home after his Asia fan tour. He is expected to attend the Baeksang Arts Awards on Tuesday night.