The Battle of Erbensong was a battle in the Wu-Chen War. On July 27th, 1868, the new government forces took over Sanchun Francisco and marched into our palace. Although Erben Songcheng correctly judged the trend of the new government forces and strengthened its defense, due to the previous surge in Baihe, the number of remaining Francisco soldiers was limited. Two Songfan lords, Dan Yu Changguo, fled to Mize, and his family, Dan Yu No.1 School, organized two Songfan youths over 6 and children aged 12-18 to form two Songfan youth teams. On the morning of the 29th, the Gongzhongkou in the east was first broken by the new government forces, and a fierce battle was also launched at Datankou. In the battle, all the members of the youth team were killed, and Dan Yu committed suicide by caesarean section after setting fire to the city.