Is Firstrade safe?

FB asked me to learn stock picking and trading methods. He added me in line and asked me to add an assistant line. The assistant invited me to join the group and follow the operations to make small profits. Later, the teacher told me to cooperate with foreign-funded institutions on a profit plan and gave the First Securities specialist line Inquiry, asking to download the app, store value remittance, reserve chips to transfer, just sell them, quickly accumulate funds through hedging, new stock lottery, huge transactions, but when requesting to withdraw money, I told the assistant that I did not reserve the target, but it was still transferred. As a result, the winning funds were insufficient, and I had to make up the funds before I could withdraw the money. The assistant said that I could apply for over-the-counter funds from the specialist. The specialist only said that I needed to deposit and repay within a time limit, but did not say that I had to deposit and repay before I could withdraw, so I still couldn't withdraw the money. It was obviously a trap. Scam, asking you to keep re-depositing money.