An individual tax was asked before a withdrawal?

On a friend’s recommendation, I downloaded the 11 APP and deposited 150 thousand. She asked me to download MI Chat and added the teacher 30 minutes before the operation. During that time, I added 50 thousand when there was a cocking market. The teacher claimed that my account is at risky. Then I added 132 thousand to do hedging, making a profit of 1.8 million or so. When it came to withdrawal, I was asked to pay a 20% margin, i.e., 300 thousand or so, at which time, I doubted whether I has been cheated.