As what Allen said, he is still in CNT setup, but we need to remember, being a world junior champion, does not mean you will be a men's champion in the view of CNT setup.
The game is evolving, new techniques comes out every season, and new rules change every day from ITTF.
CNT does not just look a performance in the past for these younger players, but rather predict which player will do better and then put support behind them. Some also jump the queue (FZD is a good example)
Sadly, only some players will get support and the others will become a "support role" to the main bunch of players.
What nextlevel says is easy, but what makes it difficult is, CNT A team, only focus on 5 players, maybe up to 7 for international tours, there is so many players fighting for that extra 2 to 3 slot (outside the top 4),
So many "potential" champions will miss out on a international career.
That's life in CNT
Not too many men's player has jumped ship, but Feng of Singapore is a good example and Li jia wei before her too. Staying in China, they can likely make the A team, but will only be training partners.
Feng has a gold medal and wouldn't have it if she stayed in China
So to me, the system works, but it also could be against them. Feng is good enough (in her prime) to be in CNT womens A team main force, but which coach/management messed it up? Yu Zhiyang could be a champion.
Chen Qi could be a champion.
But you know, Dima will always be the main force of Germany even if he is in bad form
Ma Long, ZJK, XX, FZD, one of them can't make the "team" if only 3 players is allowed
If Chen Qi was in Germany and didn't have CNT pressure, I am sure he will do better too