Samsung farmed 20%/60M units of low end units back to PRC ODMs in 2020 with plans to ramp up % before covid. IIRC there was a BOM break down of Vietnamese made Samsung phones where ~40+% of the components (not by value) were from PRC suppliers and ~25% from SKR. The reality is both SKR and VN are heavily dependant on PRC supply chains and a lot of the supply chains in VN are setup by PRC money.