Within rocketry, a lot of accusations of copying against China are just hate. The form of rockets is dictated by physics, and so there are only so many ways to approach the same set of constraints and requirements with similar technologies.

Plus, the exterior form of a rocket is the easy part. The engines, plumbing, control systems, and internal structure are the hard part (and also hard to copy part)

Only midwits shun copying. It is good way to learn. It is only bad if you lie about authorship.

And also by now it should be clear that if China look at your design and knock out a decent copy, they still did a ton of engineering to make it work.

It's like people forget Foxconn started as a copying operation and went mainstream.