This does NOT make sense. Introducing brokers usually do NOT have authority to place trades on the investors' behalf.
Remember this is China, nevermind legality, whether it's the IB or just an individual salesman, there are tons of stock/futures/forex gurus who will say "put money in the account and I'll double it in 6 months". And yes 90% of the rich people have no clue, they got their money from corruption (or just by owning a house in the right place/right time), and they don't care anything about Forex, they just want someone else to make money for them.