Hmmm... 3 notams all active between the same time frame. Pink and green look to be missile testing related but the red one is same area as CZ-2C carrying HY-1D from june 10th. Hmmmmm.....pic.twitter.com/1VrO8lmlQg
Hmm indeed, might have to see what the Chinese forums say about this since this one isn't expected in any sources I have seen.
Can the A3168/20 zone being a CZ-4 series drop zone though? 
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Also there's also A3171/20 which is also related; can you display what that zone is?
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Give my few min
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I abandoned the project so it's year+ old data but the larger zones below the white are 4C and the narrower sized ones to the left are 4Bpic.twitter.com/64gJh8yuGt
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Thinking about this, it wouldn't be the first time they used a zone identical to previous launch for a different vehicle and they have done various zone shrinkage experiments which would explain the size difference compared to previous 4b/4c launches.
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