subsequent occasion, when Li Jing wanted to send Zhang on an embassy, over the sea, to Liao, Li Jingsui personally wrote a petition to Li Jing urging against it, stating, "Zhang Yi is man who can support the state. He should be kept around to offer advice day and night. He should not be sent over the unpredictable sea." Li Jing, however, responded, "Zhang Yi is an unusual man, such that even the god of the sea would fear him." He sent Zhang on the embassy anyway. By 958, Southern Tang had lost a war against Later Zhou (the successor state to Later Han, which had succeeded Later Jin), and had been forced to cede its territory north of the Yangtze River to Later Zhou, as well as formally submit as a subject). Li Jingsui used this opportunity to submit, 10 times, petitions offering to yield his crown prince position, particularly citing his own lack of contributions to the military effort and Li Hongji's contributions in repelling the attack of Later Zhou's vassal state Wuyue during the war. Li Jing accepted his petition and created Li Hongji Crown Prince to succeed him. Li Jingsui was created the Prince of Jin, and was given the additional titles of Tiance Shangjiangjun (), generalissimo of Jiangnan West Circuit (i.e., Zhennan, but Li Jing intentionally using the more archaic Tang title for it for impressive effect), grand commandant of Zhennan's capital Hong Prefecture (), Taiwei (), and Shangshu Ling (). Upon Li Jingsui's arrival at Zhennan, he, citing the fact that, given the recent losses to Later Zhou, Zhennan was now potentially exposed to war as well, requested an official as his deputy. Li Jing thus sent Li Zhenggu () to Zhennan to serve as his deputy military governor. However, Li Zhenggu was arrogant and dominant, such that even though Li Jingsui was himself magnanimous and relaxed, he became unable to bear Li Zhenggu as time went by. He considered killing Li Zhenggu and then report to Li Jing to confess, but was urged not to by his close associates. He became unhappy, however. Meanwhile, Li Hongji, as crown prince, had sometimes carried out unlawful deeds. Li Jing, angry, had once caned Li Hongji, and, as he did, stated, "I will summon Jingsui back!" There also happened be a time when false accusations were laid against the son of Li Jingsui's staff member Yuan