Before revision: Of these 347 different military treatises from the Song period, only the Wujing Zongyao, the Huqianjing (Tiger Seal Manual) of Xu Dong in 1004 AD, and fragments of similar works found in the later Yonglo Datian , have survived.
After revision: Of these 347 different military treatises from the Song period, only the Wujing Zongyao, the Huqianjing (Tiger Seal Manual) of Xu Dong in 1004 AD, and fragments of similar works found in the later Yongle Dadian , have survived.