Simplify the following text for a Grade 5 native English-speaking person.
Original: However , he also favored another son by Consort Wang , Sun Ba ( å `` é ) the Prince of Lu , and permitted Sun Ba to have the same staffing level as the crown prince â '' a move that was objected to by a number of officials as encouraging Sun Ba to compete with Sun He , but Sun Quan did not listen to them . After 245 , when Sun He and Sun Ba began to have separate residences , their relationship detriorated further , and Sun Ba began to scheme at how to seize heir status from Sun He .
Simplified: All along the next nine years , He would have trouble with his brother Sun Ba who wanted to be Crown Prince instead .