After waiting 18 days at his position, Zhang spotted an enemy and immediately aimed and fired 12 shots, only to miss them all. This eager action attracted enemy fire, which almost killed him. After this, he carefully analyzed why he failed and figured out a technique using the iron sight to improve his shooting ability. He shot down one enemy the next day.
On February 15, he hit 7 enemies with 9 rounds, which surpassed the ratio of many experienced snipers. He achieved a total of 214 confirmed kills in 32 days.