I (ethnic Chinese) went to China with two friends from Texas in the early 2010s. One of them has long blonde hair. She was never stopped in Shanghai, a couple of times in Beijing, but in Chengdu, they were just so amazed by her and her husband (but mostly her and her long blonde hair). People wanted to take pictures with my friends.
Maybe things have changed a lot since then but worth a try! Chengdu is definitely worth visiting and I'm sure there are many very interesting more inland cities in China to visit (and maybe be a celebrity for a moment).