Although history is not my domain, I'll try. What I found is that there used to be a unit known as "Guangzhou Car Repair Shop" (广州小汽车修理厂) which was designated as a repair shop for the local and imported vehicles in the area. In the 1970s, they used to make a copy of the BJ210 (predecessor of the BJ212) called GuangJi. Using that chassis and mechanicals as the base, in 1975-76, two units of these sedan cars were built, the body panels being made by hand. Design was apparently influenced by the current Toyota Crown and Volga, and known simply as Guangzhou sedan (jiaoche). They however concentrated on production of their jeep which continued for a while.
Nothing more! These are the only two photos I have too. I don't have photos of this GZ210, but I have photos of the Guangzhou made BJ212, named GZ215 and GZ215A. Great work DMitra, I can retire I think!
No no that's a misunderstanding: GZ210 is the twin model of the BJ210 cross country jeep. This sedan was (when a code was used) GZ750 or GZ760.
The book is about the unknown cars of the 1990s, not seventies. And it is progressing.
Yes, noticed some of the differences -wheel arch, window frames, windshield, the front clip metal surround, for example -- expected, as they were hand-built and using whatever material they could lay their hands on.
Both the Chinese articles I quoted do mention "two" being made:
I think that picture is from Erik's web page for his book "MADE IN CHINA. LOST SMALL CARS OF THE 1990s." and it also appears on the book's cover page. It is a fascinating book and if you can spare EUR 59, you should buy it
Coming to your question, and to get you further interested, this is one of the versions of a car made by the People´s Liberation Army No. 5408 Works, badged LINGKONG KJ6380/TIANMA KJ5010 (not to be confused with later SUV Tianmas). There were a few visually different versions and bodystyles but all loosely based on the Charade.
The above info is from Erik's book. I hope Erik won't mind the little info I divulged.