Is Qiu Si's Thought a Verb or a Noun?

It should be a noun. If you are thinking about autumn, it is a verb. Autumn here is a noun as an attribute, especially what autumn thinks, not autumn thinking. If you say it as a verb, there is a sense of aimlessness. What are you thinking about? It is mainly about Qiu Si, so "thinking" here should be a noun.

The following is the meaning of "thinking" from Baidu: ● Thinking (sρ) 1. Thinking, thinking and thinking: ~ thinking (1) objective existence reflects the result of thinking activities in people's consciousness; B. ideas, ideas; C. thinking). ~ I feel. ~ cable. ~ dimension. Sink. Find ~. See different ~ move. 2. Miss, Miss: ~ Miss. ~ love. Phase ~ 3. idea: ~ thread. ~ ambition (novel and original ideas, interests). Structure. 4. Last name. ● Thinking (sāi) 1, the appearance of a beard, such as "scratching your chin." 2. Think about it.