Fang Zhongyong，a prodigy in ancient China, can indite wondrous poems centered on the subjects designated by others. His uncommon literary creation gave him a great reputation and many people sent for him to show talents. Without prudence to treat praises, he got immersed into others’ flattery and failed to make any progress. Ultimately he reduced to an average person.

creation 指“艺术创作” 或 “文学创作”时，若用作可数名词，是指具体的作品。用单、复数均可，单数指一件作品，复数指多个作品。

本句，His uncommon literary creation，可以有两层含义：1. 可数名词（指他的某一件作品）2. 不可数抽象名词，指“创作行为，创作活动”。根据语境，本句应该是后者。