The Chinese cannot. In ECM/ECCM, there is no such thing as 'simulation'. If there are any sort of 'simulation' going on, it will be to simulate the consequences of a failed system, but not of or on the system itself. If there is a known technological gap between adversaries, especially if you are in the inferior, you cannot know the ECM tactics the superior can or will employ against you. The best you can do is assume the worst, which is that your system will fail in the superior electronic onslaught, and simulate recovery responses.
Sir regarding your reply in the China air defense thread, I wanted to take this scenario hypothetically a bit further . As you remarked its not possible to know what ECM measures your adversary will deploy against you, Assuming that "your system fails in the superior electronic onslaught" what kind of recovery measures can be undertaken in such an event ?