Not quite. The Chinese stars were doped to the gills in the 90s, literally uncontrolled all year long except for at Worlds and Olympics, when neither EPO nor blood transfusions were detectable.
Since 2017, the Kenyan stars have to dope in a rather restricted manner, even while in Kenya, in order to avoid getting caught by the AIU. EPO and blood transfusions are detectable of course. A good example is Kipruto, whose blood doping values are well documented: he was obviously holding back with the dosages (the AIU called it "sophisticated") and was still banned, although years later, because he only went a few times in 4 - 6 years above the threshold.
You are likely correct about this but the incidence of doping amongst Kenyan runners is likely to be as high.
Those who say the track was short obviously never watched them at Stuttgart just a few weeks prior.
The 1500 winner closed in 1.57 for the last 800. In the the 3k they locked out the podium with a sub 60 final lap. Wang in 10k closed the last mile in 4.20 in 30 degree heat looking as easy as anyone you'll ever see.
Why would they need a short track?
Yet there are some here - who shall remain nameless - who deny the performance enhancing qualities of drugs in distance running, maintaining that performance gains from drugs are only "belief" not fact. Obviously you only saw what you "believed". The clock was lying.
This post was edited 2 minutes after it was posted.