I start thinking this is intencional: Chinese CEOs do some 'small mistakes'
to devaluate the stock by 'natural' way. Then they may buy back cheap shares through third parties. After that they sell after pumping made by paid pumpers. This repeats cyclically, over and over again. This is not against the Chinese lows, they suck US small shareholders money, the CEOs have access to privileged information which is not revealed to the shareholders. THIS IS ONLY HYPOTHESIS. SGOC is halted in similar situation.