There is 13 hours time difference between EST and BeiJing.
So, April 14th 12am Eastern Time is mean April 15th 01am BeiJing Time(UTC +8)
That's completely false and also you have done the math wrong a 13 hour difference from 12am wouldn't be 1am the next day that would be 25 hour difference

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The real time difference between Eastern and Beijing is 12 hours. So 12am Eastern time would be 12pm in Beijing.