This is not surprising. I saw some popular science videos about Hezbollah in Lebanon. They gradually improved their combat capability in the process of fighting with the IDF. They were able to capture the reconnaissance images of Israeli UAV very early.
Similarly, Iran's UAV technology has been gradually improved in the competition with the United States. They maximize the use of all available technology sources and can produce at a relatively low cost.
PLA's electronic warfare capabilities have certainly improved in those nearly 30 years. I used to think it was just propaganda, but after seeing the western news, I realized that the situation was much more optimistic than I thought.