On-market subscription refers to funds or stocks purchased through the securities company’s trading software after opening an account with a securities company.

The market is the stock market, which is what everyone calls the secondary market.

OTC refers to outside the stock trading market, which is the consignment sales of banks and securities companies, and the direct sales method of fund companies, which are the familiar open-end fund sales channels.

Closed-end funds and ETF funds can only be purchased on the exchange (for large investors, ETFs can be purchased in the "primary" market), that is, they can only be purchased in the stock market.

Other open-end funds can be purchased over-the-counter, in a well-known way, and LOF funds can be purchased on-site.