怎樣為之洗黑錢? 通常有什麼手段? 為什麼要洗黑錢?

洗黑錢即是把不能名正言順拿出來的金錢用一些途徑轉化為可公開的資產。
可經賭場，金融機構，股票市場等。
因那些錢的來源是非法的，不經過洗黑錢的處理是非常困難作正常使用。

Money Laundry means washing the illegal money and turn it into legally acceptable.
Using financial institutions and casino are the common and massive ways for doing it.
For example,
If a trial society borrows your account and put the money into your account, and then you draw a cheque or withdraw the cash from the account. The money was being washed. The sources of money is from you.
The real operaion is not so simple, there may be thousand of accounts involved and many professionals will also be involved.
But there is no free lunch in the world! right!