How do i get to Forbidden city from Huiyuan Service apartment by metro?

If by metro, you have to walk a lot. So you are suggested to take the local bus 124 at Forbiden City bus stop to get off Anhui Qiaobei Station. Then you can walk to your destination.

Anyway, here is the way by metro: at Tiananmen East station, take subway line 1 to Dongdan, where transfer to line 5 and get off at Huixin Xijie. Then your destination is around 1.8km away.