Simplify the following text for a Grade 5 native English-speaking person.
Original: Although LÃ 1\/4 Bu knew Gao Shun was very loyal , his advice was not always welcome .
Simplified: In the later period of the Han dynasty , Gao Shun served LÃ 1\/4 Bu . He grew to be known as one of LÃ 1\/4 Bu 's best commanders .