Navigation warnings for ships of drop zones for the Chinese LM-5/TW-1 Mars Orbiter & Rover launch seems to have been issued, for 04:00 - 07:00 UTC on the 23rd. No corresponding air space closure notices yet. (Ref. NAVAREA XI NO.20-0271)
IIRC during the last LM-4B launch there are official reports that the 2nd stage performed a precise dogleg to change its drop zone to a different smaller zone. This would fit. https://mp.weixin.qq.com/s?__biz=MjM5MjMxOTcwMQ==&mid=2651278410&idx=1&sn=e8a5f208ec432cd7fdb7ee676cd0487e&chksm=bd5bfdf08a2c74e6497e4104cb60cdf6bf1e46433cfcbbac649e5b7679d951174b75b48ce11e&xtrack=1&scene=90&subscene=93&sessionid=1593747396&clicktime=1593747397&enterid=1593747397&ascene=56&devicetype=android-29&version=27001037&nettype=WIFI&abtest_cookie=AAACAA%3D%3D&lang=zh_CN&exportkey=A5168P41e3cX2xgeTIv5g84%3D&pass_ticket=m3Ca6L9wtDIz21Kx5EfX5%2BpzrcxhdoR48Jv1AJs18DqbpFBUqpbc3%2FaEXS69kNlC&wx_header=1 …