Can somebody please explain me why Xie Huai'an ended up in jail in the special episode even after bringing peace in Chang'an and about his relationship with Cen Weizong? According to me, I think Xie Huai'an is also a Tiemo person but from a different fraction that's why he ended up in jail. Also Cen Weizong was a Tiemo but he helped Xie Huai'an that means he is also from that fraction only. The person want Huai'an to complete a work for him, take over Tiemo and forget about the past between him and Tiemo king.
According to me, I think Xie Huai'an is also a Tiemo person but from a different fraction that's why he ended up in jail. Also Cen Weizong was a Tiemo but he helped Xie Huai'an that means he is also from that fraction only. The person want Huai'an to complete a work for him, take over Tiemo and forget about the past between him and Tiemo king.