From
刘禹锡 《
秋词二首》 (Tang, ca. 9th c.):
山明水净夜来霜,
数树深红出浅黄 (Bright hills, clear waters, frost by night; a few trees of deep red stand out from the pale yellows). Liu Yuxi's famous rebuttal to the stock 'autumn = melancholy' trope: autumn for him is crisper, sharper, more inspiring than spring.