Are western currency's on the verge of collapse?

Here are 3 very interesting and very distrurbing charts

The US dollar vs the Chinese Yuan — One US dollar buys about 7 Yuans — but dips 3 times in April to nothing and once in May — 4 DROPS to almost zero

http://ca.finance.yahoo.com/currency/convert?from=USD&to=CNY&amt=1&t=3m

And the Canadian dollar does the same thing
http://ca.finance.yahoo.com/currency/convert?from=CAD&to=CNY&amt=1&t=3m From 1 Cdn dollar buying 5 Yuans to almost zero —4 times

And the Euro does the same thing during the same time frames as the US and Canadian dollars

http://ca.finance.yahoo.com/currency/convert?from=EUR&to=CNY&amt=1&t=3m

———————-

What the hell happened between April 3rd and 23rd and again just after May 13th ?

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