Let's see the state of construction as of July 9, 2020, as production accelerated and hit 50,000 total.
The data provided by Moneyball, shows 49,799 Made-in-China (MIC) Model 3 produced in the first half of the year (a small number was produced also in December 2019).
No other single model was even close to 20,000, as 2nd best GAC Aion S was at 15,617.
Tesla Gigafactory 3, with its record June, was a key contributor to the second-quarter results. The company was initially targeting production of 3,000 Model 3 per week (150,000 annually), but now might be closer to 4,000 units per week (200,000 annually).
Additionally, as we can see in the latest video from Jason Yang, the construction of new buildings, including a new assembly facility for Model Y, seems now (as of July 9) closer to an end than to the beginning.
According to the description, external walls on all the new workshops soon should be completed so the installation of the equipment will progress at full speed.