Information for friends want to do business in China

I came here and got messages asking about to do business in China.
Now share some info here and hope it helps a little.
First:It is difficult if you do not know how to do.
Second:You know how to do,but you cannot do it,it is also risky.
Third: you can do it and others can also do it,if do not know China culture and some social psycology,you still have problems.
Fourth:Always think twice before you want to do business in China.

I read a poll that 40+ Americans thought China is richer than USA,of course totally wrong,though there are many investment opportunities.
I read articles call on not to do business in China,this is coward and not right too.

：）
it should be 'Five: Go to someone who knows English, at least knows English well for advice...'
right?
I am not careful in writing formally ,maybe I should change .
One of my English friend told me that my English is better than his.
The reason is I am very careful in writing then