I originally planned to go to Wensu Grand Canyon, but it was closed due to weather, so I went to Tianshan Mysterious Grand Canyon instead.
Luckily, the weather was great; with the blue sky, the canyon's colors were particularly bright, and the contrasts were even more striking, making it perfect for taking photos in bright colors.
The temperature difference inside the canyon is significant, depending on whether you get sun exposure. I recommend bringing a scarf this season; it's warm and can also be used as a photo prop.
Although the scenic area isn't very large, walking around and taking photos will still take about two hours. If you don't want to walk, you can take the park shuttle bus or choose to ride a camel.