Simplify the following text for a Grade 7 native English-speaking person.
Original: After the loss of the post at Tayoan , the Dutch East India Company made several attempts to recapture it , and even formed an alliance with the Qing Empire to battle Koxinga 's fleet .
Simplified: After the loss of Tayoan , the Dutch East India Company tried to recapture it . They joined with the Qing Empire to battle Koxinga 's fleet , but failed .