Emperor Fei
In late 365, Emperor Fei offered the title Prince of Langya to Sima Yu and further created his heir apparent Sima Yao the Prince of Kuaiji. Sima Yu declined on his son's behalf and further himself declined the title of Prince of Langya, continuing to refer to himself as the Prince of Kuaiji, and Emperor Fei did not insist on his taking the greater title.