It gets confusing when Hudong Zhonghua is in the Huangpu River. So when you mean Huangpu, are you referring to the river or the shipyard? The shipyard named Huangpu is said to be in the Guangzhou area. In fact the full name of it is Guangzhou Huangpu Shipbuilding Company, just to make sure there is no confusion.
Note the shed on the right of the shipyard's picture. That's where many Type 054A and 056 were born. Not a big shipyard you can see, but it produces a lot of other smaller vessels for the PLAN like the SWATH type catamarans meant for sonar surveillance.
Is Huangpu capable of making 052D and 055? They need to double the rate of making these ships in this hostile environment.