While adding some Chinese-made vehicles, I encountered an issue where a single type of vehicle has two different manufacturer names—for example,
Guangzhou-Toyota Camry & GAC-Toyota Carmy
https://www.imcdb.org/vehicle_1058644-Guangzhou-Toyota-Camry-XV50-2012.html
https://www.imcdb.org/vehicle_1924860-GAC-Toyota-Camry-XV50-2012.html
Chery/Qirui A3
https://www.imcdb.org/vehicle_2102798-Chery-A3-2008.html
https://www.imcdb.org/vehicle_428989-Qirui-A3-M11-2008.html
Great wall / Changcheng Safe
https://www.imcdb.org/vehicle_345075-Great-Wall-Safe.html
https://www.imcdb.org/vehicle_924363-Changcheng-Saifu-2003.html

But in reality, it is the same manufacturer.Moreover, the name ”GAC Toyota“（广汽丰田）is more commonly used.

Furthermore, much like Mazda did in the 1990s, Chinese automakers frequently register separate sub-brands for their products; however,IMCDB sometimes group these sub-brands under the parent brand,for example,
https://www.imcdb.org/search.php?make=GAC&model=trumpchi
(Trumpchi/“传祺“）
https://www.imcdb.org/vehicles.php?resultsStyle=asImages&sortBy=0&make=Geely&model=- emgrand
(Emgrand/”帝豪“）

while at other times listing them on separate pages—
https://www.imcdb.org/vehicles_make-Englon.html
（Geely sub-brand）
https://www.imcdb.org/vehicles_make-Aion.html
（GAC sub-brand）

or even employing both methods simultaneously.
https://www.imcdb.org/vehicles_make-Maxus.html
https://www.imcdb.org/vehicles_make-SAIC_model-Maxus.html
https://www.imcdb.org/vehicles.php?make=SAIC
Datong/Maxus/SAIC Maxus

https://www.imcdb.org/vehicle_918885-Great-Wall-Haval-H6.html
https://www.imcdb.org/vehicles_make-Haval_model-H6.html

Are there any naming conventions or standards for this?