You still have to go to Shenzhen to learn ``````````` authentic `````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` The boss is very cunning. He is good at bluffing first and then fooling others. You can't really learn technology. It's not practical and you can't open a shop, let alone do business for a long time. Everyone is really a bad roast meat industry, which has harmed many students, delayed time, wasted tuition and ruined the business you want to do.