Complex sentence: Probably advised by Zhang in this, Liu employed Hán Xin (not to be confused with Liu Bang's general of the exact same name), also a member of Hán royalty the new Prince of Hán and sent him to attack Zheng Chang.
Split into simpler sentences: Probably advised by Zhang in this, Liu employed Hán Xin (not to be confused with Liu Bang's general of the exact same name), also a member of Hán royalty. The new Prince of Hán and sent him to attack Zheng Chang.