ST components ( Made in China) from China market(Shen Zhen) are authentic andqulify or not ?Last year we bought STM32F030K6T6 500 pcs at the price of 4.2CNY/pcs.(~0.62USD)And a few thousands of STP75NF75 at 2.4CNY/pcs.(~0.35USD)All components are wor...