I just wondered about timings. In this article found by Strubbel I could find:
In November, SilTerra was appointed by China’s leading microelectronics producer, Beijing Yandong Microelectronics Co Ltd (YDME), to set up an eight-inch wafer fabrication plant worth RM2.9bil in Beijing.
The plant will cover 73,260 sqm and is expected to be in operation by the first quarter of this year. It is estimated to generate a monthly output of 50,000 wafers
From November '18 to let us say March '19, just 4 Month, this is fast! But things can be done in PRC - like building a Gigafactury in 12 months...