It actually differs from the certificated rubber, so technically it's not legal as factory tuning. Factory tuning is the tuning that the factory does before sending to the ITTF to pass the cetification.
Not only LGL, most WTT offcials have multiple hats. The members of the Task Force established by ITTF caused most of the players' concern they are going to address.
Some crazy fans think Chen Meng won Sun Yingsha by some "secret training and skills", "expose the weakness of Sun Ying Sha to the whole world".
It's really ridiculous and unreasonable. And it still appears in the internet on daily basis. Crazy.
CNT's boss is all about keeping the position (by politics) and making money, not about making the team play better. If the team playing worse helps the goals, he would do it without a blink.
They don't play pingpong. They are teenagers. They treat players as idols. What can you expect? Especially after their idol thanks them when they attack/annoy the opponent.
As of today, Astana, Kazakhstan has similar Humidity and air pressure with Beijing. That's not the reason.
The ball and table might have some impact to the players' performance. But everyone are using the same table and ball.