Koxinga family name Zhu
Under the Longwu Emperor
In 1645, the Prince of Tang was installed on the throne of the Southern Ming as the Longwu Emperor with support from Zheng Zhilong and his family. The Longwu Emperor established his court in Fuzhou, which was controlled by the Zhengs. In the later part of the year, Prince Lu proclaimed himself regent (監國) in Shaoxing and established his own court there. Although Prince Lu and Longwu's regimes stemmed from the same dynasty, each pursued different goals.
Owing to the natural defenses of Fujian and the military resources of the Zheng family, the emperor was able to remain safe for some time. The Longwu Emperor granted Zheng Zhilong's son, Zheng Sen, a new given name, Chenggong (成功; Chénggōng; Sêng-kong; 'success'), and the title of Koxinga ("Lord of the Imperial Surname"). One of his cousins also had it.In 1646, Koxinga first led the Ming armies to resist the Manchu invaders and won the favor of the Longwu Emperor. The Longwu Emperor's reign in Fuzhou was brief, as Zheng Zhilong refused to support his plans for a counteroffensive against the rapidly expanding forces of the newly established Qing dynasty by the Manchus. Zheng Zhilong ordered the defending general of Xianxia Pass (仙霞關), Shi Fu (a.k.a. Shi Tianfu, a relative of Shi Lang), to retreat to Fuzhou even when Qing armies approached Fujian. For this reason, the Qing army faced little resistance when it conquered the north of the pass. In September 1646, Qing armies broke through the inadequately defended mountain passes and entered Fujian. Zheng Zhilong retreated to his coastal fortress and the Longwu Emperor faced the Qing armies alone. Longwu's forces were destroyed; he was captured and was executed in October 1646.
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