In spring 758 , his title was changed to Prince of Cheng .
In winter 757 , Li Chu returned to Chang'an with Guo , and was subsequently created the greater title of Prince of Chu .
In spring 758 , Li Chu 's title was changed to Prince of Cheng .
In winter 757 , Li Chu returned to Chang'an with Guo , and was subsequently created the greater title of Prince of Chu .