first track the medical index. Medical index refers to the listed company's main business is medical devices, which is compiled into an index by weighted average method, that is, medical ETF. Medical ETF generally refers to on-site funds, that is, they can be listed on the exchange and traded directly like stocks.

in a nutshell, the medical etf is the E Fund's Shanghai and Shenzhen 3 medical and health trading open index securities investment fund.