Chinese authority is funneling all the public donations through five designated charities.  Why is Chinese authority doing so?  What is the legal basis for this measure?  Is the measure efficient?

Once slammed for its underperformance, Wuhan Red Cross is gradually catching up.  Please see its announcement of overseas donation process here http://www.hbsredcross.org.cn/xxgk/4424.jhtml.  The webpage can be translated into English in Chrome.