Simplify the following text for a Grade 6 native English-speaking person.
Original: In 1683 , after the Battle of Penghu , Zheng Keshuang gave in to the Qing Dynasty 's demand of surrender , and his kingdom was incorporated into the Qing Empire as part of Fujian province .
Simplified: In 1683 , after the Battle of Penghu , Zheng Keshuang gave himself up to the Qing . His kingdom was added to the Qing Dynasty as part of the Fujian Province .