Can I buy the national debt after it is issued or can I buy it at the bank at any time?

Treasury bonds are uniformly issued by the Ministry of Finance, which stipulates the interest rate, term, issue date and total amount. They are also sold by underwriters and distributors. Underwriters are usually banks and securities companies, and they will advertise when they sell, but they usually subscribe for some internally, so the quota at each distribution outlet is very small. It is a joke to queue up at the bank to buy them. Recently, Treasury bonds have been sold out in less than 1 minutes at some big bank outlets. I guess you are.

suggestion: if you want to buy it, you should open a personal online bank to place an order in online banking, and you can queue up in online banking after : on the day of issuance, which is much more time-saving and labor-saving than waiting in line at the outlets!