One should understand the context of Lin's remarks - he is now the chief economist of the World Bank.
What he says represents first the World Bank. How much he can speak as a Chinese economist is difficult to gauge.
Even assuming what he said on the value of the $US and interest rates in the US were correct, then there is always an issue of who should prop up the $US and keep the interest rate low in the US? Why should that be China?
At least, there is a free rider issue to consider.
More importantly, don't automatically assume that what famous economists say are always or automatically correct. Use one's mind and think.