What you heard doesn't sound implausible. With such depth of talents, theoretically speaking, it could be true to some extent. But, on the other hand, many of CHN's national coaches are not old, still quite fit and haven't lost touch with their skills, so they could personally guide and spar with their charges on how to deal with certain troublesome opponents. As for these sparring partners, if they do their job very well simulating the foreign players like Lee CW, for example, I'm sure the exceptional ones will get a chance to be inducted into the national team one day. Whatever, I shan't speculate too much.