Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Renminbi:

"

During the era of the command economy, the value of the renminbi was set to unrealistic values in exchange with Western currency and severe currency exchange rules were put in place, hence the dual-track currency system from 1980 to 1994 with the renminbi usable only domestically, and with Foreign Exchange Certificates (FECs) used by foreign visitors.[citation needed]