It created so-called “Central Bank Bills,” which commercial banks are supposed to buy voluntarily. When they do, the money they pay is also locked up in the PBC’s accounts.
人行创设了所谓的“中央银行票据（央票）”，由各商业银行自愿购买。当银行买入这些央票之时，他们所支付的货币也被锁定在人行的账户内。迄今为止，大约有5%~6%的货币都通过这种方式回流到了中央银行。