Regulations For Management Of Central Government Bonds Article 39

After the verification and cancellation is performed by the Ministry of Finance, the head office of each bank shall seal up and keep the redeemed bonds or interest coupons; in addition, specify the reference number for the cancellation and destroy such coupons upon expiration of custody period.The procedure for canceling the bonds or interest coupons redeemed by the Central Bank of China shall be the same as those redeemed by the head office of each bank.
中文原文 中央公債經理辦法第39條
財政部辦理核結後,各承轉行應即將付訖本息票密封保管,並註明核結文號,俟保管期滿辦理銷燬。
中央銀行經付本息票核結手續與各承轉行同。

English translation for reference only; the Chinese text prevails. Not legal advice.