GSX Q3 loss fortold by put options pricing

$GSX Techedu$ Down 15% pre-market so far. But it was down a lot before the earnings. Otherwise, it would drop a lot more.

The options pricing before earnings was significantly skewed towards puts. When GSX increased from 68.18 to 71.78 yesterday, the far-out-of-money puts stayed the same. It seems that some kind of insider trading already revealed a bad quarter.