I believe what he is referring to is this excerpt from the Official Bitcoin Noticed issued by the Peoples Bank of China:

"Financial institutions and payment institutions are not allowed to use bitcoin...or directly or indirectly provide customers with other services related to bitcoin"

See paragraph 3 of this English translation provided by BTC China https://vip.btcchina.com/page/bocnotice2013

Essentially, banks are forbidden from having anything to do with bitcoin, directly or indirectly.