Securities investment fund refers to a collective investment method that raises funds through public offering of fund shares, is managed by the fund custodian and managed and used by the fund manager, and makes securities investment in the form of asset portfolio to seek benefits for fund share holders.

National debt can be divided into voucher-type national debt, book-entry national debt and savings bonds (electronic).

Voucher bonds need to be purchased through the counter of China Merchants Bank;

When savings bonds (Electronic) subscribes for online banking, personal banking professional edition (the counter is only associated with one card) and wealth account professional edition, you are allowed to open a national debt account first;

Before buying book-entry treasury bonds through online banks or counters, you will also be prompted to open an account.