《明史·列传·卷六十》
都督孙镗攻击也先失利，想进城，程信不让进，率军从城头上射箭放炮帮助他。
都督孙镗击也先失利，欲入城，信不纳，督军从城上发箭炮助之。
Governor-general Sun Tang failed to attack and retreat, wanted to enter the city, Cheng Xin did not let him enter, led the army from the city head to shoot arrows and fire cannons to help him.