At this time, the Dutch East India Company was trying to force China to open a port in Fujian to Dutch trade and expel the Portuguese from Macau. When the Dutch were defeated by the Portuguese at the Battle of Macau in 1622, they seized Penghu, built a fort there, and threatened raids on Chinese ports and shipping unless the Chinese allowed trading with them on Penghu and that China not trade with Manila. In response, the Chinese governor of Fujian demanded that the Dutch withdraw from Penghu to Taiwan, where the Chinese would permit them to engage in trade. The Dutch continued to raid the Fujian coast between October 1622 and January 1624 to force their demands, but were unsuccessful. In 1624, the new governor of Fujian sent a fleet of 40–50 warships with 5,000 troops to Penghu and expelled the Dutch, who moved to Fort Zeelandia on Taiwan.