In the second year of Song Duanzong Jingyan (1277), Fuzhou fell, and Song Duanzong went into exile in Quanzhou in the Southern Song Dynasty. Zhang Shijie's request to borrow a boat was rejected by Quanzhou Shipping Company and Arab businessman Pu Shougeng, and then Pu Shougeng, who had been unfaithful for a long time, surrendered to the Yuan Dynasty. Zhang Shijie hijacked a ship and went to sea, so the exiled court in the Southern Song Dynasty had to go to Guangdong. Song Duanzong was ready to flee to Leizhou, only to be hit by a typhoon, the emperor's boat capsized, and Song Duanzong almost drowned and got sick, and soon died. After that, 7-year-old Wang Wei Zhao Min acceded to the throne, with an auspicious title. After Zhao Min acceded to the throne, Lu Xiufu, the left prime minister, and Zhang Shijie, the teacher of the Prince, escorted Zhao Min to the cliff mountain and set up a stronghold in the local area, ready to continue to resist Yuan.