AHC/WI - shortlived Taiping Heavenly Kingdom successor state in Taiwan

In a scenario where the Kingdom of Tungning survives and manages to take over Taiwan, the challenge is to have a breakaway segment of the Taiping Heavenly Kingdom (possibly led by Hong Rengan) during the Taiping Rebellion attempt to conquer Taiwan and manage to gain at least one third to a half of Taiwan prior to the island coming under Japanese rule.
 
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