1. Securities companies: You can buy index funds from self-service terminals or online trading platforms of securities companies, and choose securities companies with good reputation, user experience and service to buy through their trading platforms.
2. Fund company: You can directly contact the fund company of the index fund for subscription. Fund companies usually have their own online fund sales platform or channels of cooperation with other securities companies.
3. Banking service outlets: Index funds can be purchased at banking service outlets, online banking or mobile banking.