In the Tran army, Pham Ngu Lao was not only good at martial arts but also an excellent archer. Before returning under Hung Dao Vuong, Pham Ngu Lao used to apply for martial arts status quo. In the archery competition, instead of shooting at the pre-installed target, Pham Ngu Lao raised his arrow to shoot at the flying flag strip of the court, the arrow flew on the target, causing the flag strip to fall to the ground, because of this he was closed the crime and sent back home.
Regarding the shooting and dropping of the flag strip of the court, there are also documents that claim that it was not Pham Ngu Lao who shot down the flag strip at the contest for the status quo martial arts contest, but that Pham Ngu Lao happened to meet the general of Hung Dao Vuong, Nguyen. Ge Lo is practicing archery. Ge Lo is considered the best archer of the time. Pham Ngu Lao tried his best but did not shoot at the pre-installed target but shot the flag strip flying high, the arrow hit the target, causing the flag strip to fall to the ground.