Unable to withdraw

After adding you through QQ, he proclaimed as the staff of property company and auto parts company, saying that he could help me make money since his cousin can bring about lowdown. Having seen his screenshots, I got registered and earned 1400 yuan or so by 3 times. On the next day, he asked me to deposit 200 thousand with 20 thousand as the proportion. I did so and added another 30 thousand to participate in the activity. I also added 10 thousand to get the free 1888. Then he told me that he deposited 500 thousand, conning me to add 50 thousand with 10% prepaid fund. When it came to withdrawal, he asked me to make up for 15 thousand before a withdrawal.