PR China ISOT (Mao in Modern Day)

  Well it was founded in 1949 IIRC so would that mean that Tibet was still independent, along with affecting the status of Hong Kong and Macao?  Or do you mean the territory of the PRC today is replaced by its 1949 equivalent with a 1949 Tibet - including a young version of the current Dalai Lama - and British HK and Portuguese Macao from those dates? 

  There's going to be a huge economic impact considering how much of the world economy is dominated by China, especially in terms of industrial production and finance.  A lot of chaos and will also affect all the PRC citizens outside the country at the moment, unless they also disappear?

  Suspect that Deng will die fairly quickly once Mao learns what happens to his ideas, unless just possibly Mao himself is couped as the other leaders realise what a disaster he was for the country. 

  Given how nasty the regime was, and its technological backwardness there may be a desire to intervene to try and replace it by a more civilised regime, although there may not be the political will to do this, especially with the world-wide economic disruption occurring.  Although possibly the government of Taiwan may try something.

   N Korea has lost its main economic and political supporter so that regime may become unstable, which could be nasty.  There's also the possibility that Russia or possibly Kazakhstan - thinking of the Xinjiang here - might step in and encroach on the borders of Mao's empire.

  In the short term definitely as a lot of suppliers are lost.  As well as export markets for some goods, as China has only about a third of the 2018 population who are also a lot poorer and have little ability to buy from foreigners.

  In the longer term someone is going to have to produce the goods that China was producing and while the rest of East Asia are likely to fill the bulk of the shortfall America and other western nations could see at least a temporary boost.

  Possibly even more disruptive could be the financial impact.  While some elements may think that cancelling debts to the 2018 PRC helps the US [and other nations] debt position it does cause uncertainty in the markets, which is rarely good.  Also while existing debts could possibly be cancelled unilaterally much of the west is still running massive budget deficits and who's going to buy their debts now and at what cost?

  I wonder who you mean?    Suspect he would be happy with the change, at least initially.