### Chinese: 还有你想那么多的厂家每年的广告费都要几千万甚至是几个亿，这个费用何来？
### English: How come so many manufacturers spend tens of millions or even hundreds of millions of RMB on advertising every year?
### Errors: There is a major error at "RMB".

### Improved English: Just think about where the tens of millions or even hundreds of millions yuan advertising fee of the manufacturers come from every year.