What climatic conditions do maple leaves need to be red?

oh, I'm sorry! I haven't been on Baidu for a long time, and I only saw your help today. The maple leaves in Debao usually start to bloom in November of Gregorian calendar. The climate in Debao is mild and the temperature is low all the year round (you need to cover the quilt all year round when you sleep at night), so the maple leaves bloom late and last for a long time. The 212 Debao Hongfeng Tourism Festival will be held on December 2th, 212. Welcome to Debao when you have time!