The boom in demand is located in the low-end segment of the market. There's no shortage of X470 motherboards in China, but boards based on the A320 are hard to find:
The budget A320 chipset is the hardest to come by, which is a popular choice alongside quad-core A8 9600 APUs, and inventory and supply of A320 motherboards has been deemed inefficient for the surging demand. B450 motherboard inventory is supposedly growing steadily in response but supply is still short, and the A68, a throwback to the days of pre-AM4 A-series APUs, are also running low, but looks to be bouncing back to satiate demand at a regular pace.Via: PCGamesN