He sought peace through Ma , but the peace proposal was opposed by Li Sheng and Han .
Meanwhile , Shang continued his incursion , but by spring 787 was running into difficulties with the livestock of his army dying due to illnesses .
Shang sought peace through Ma , but the peace proposal was opposed by Li Sheng and Han .
Meanwhile , Shang continued his incursion , but by spring 787 was running into difficulties with the livestock of his army dying due to illnesses .