If you understand Xi's history and his rise to power, these purges are not unusual. Xi is heavily invested in his policies and will stop at nothing to save his face and the face of the China he has created. China is currently having huge problems domestically and Xi's Belt and Road initiatives are under pressure due to corruption at all levels. Sri Lanka is a prime example of just one of these Chinese foreign investments gone bad. If Putin had not made an appearance at the last Belt and Road summit it would have been a bust.

With massive government corruption at all levels and the economic pressures from the collapsing real estate and financial markets coupled with high unemployment, the danger of cracks forming in his control due to these problems is huge. The rumblings and discontent of the Chinese people despite massive propaganda efforts is bleeding through. His control is showing evidence of tofu-dreg similar to China's massive tofu-dreg construction. So no, this is not a DS purge - it is Xi trying to squash any and all possible dissent - typical of all authoritarian communist regimes.