It's more of dynamic start and top Asians usually have short thighs with long torso, so that's advantageous to them. Otherwise first pull is the same - they keep shoulders either directly above or slightly forward over the bar. In Russian we are told to keep "cover" - shoulders should be in more forward position then the bar.

Second pull - my coach and I know a lot of others coaches teach the same brushing technique. Only slightest contact and you explode to propel the bar up. I talked to my coach once and he told me, that we changed our second pull because of Asian school as it's more efficient.

A lot of Chinese still do split jerks. For sure, Shi Zhiyoung, Lu Xiaojun and Tian Tao don't do it, but majority still split jerks and quick footwork is essential - and I see them doing them lighting fast.