Can I fly Dajiang drones in Changfeng Park?

It should not be possible.

This is very dangerous. Drones including those from DJI still have a chance of crashing, so try to avoid flying in areas with a lot of people. Most domestic scenic spots and parks are prohibited from flying, and some have obvious slogans saying "The use of aircraft is strictly prohibited, and violators will be severely fined."

If you just want to fly a few meters high to take photos or something, you can discuss with the park in advance to see if you can fly.