The ETF you're referring to is likely the 南方沪深300ETF (Southern ShanghaiShenzhen 300 ETF), which is a type of ExchangeTraded Fund (ETF) that tracks the performance of the ShanghaiShenzhen 300 Index (沪深300指数).

Here's some basic information about this ETF:

Full Name: 南方沪深300ETF (Southern ShanghaiShenzhen 300 ETF)
Abbreviation: 沪深300ETF
Ticker Symbol: 159919
Listing Date: 2012年4月4日 (April 4, 2012)
Issuer: 南方基金管理有限公司 (Southern Fund Management Co., Ltd.)
Underlying Index: 沪深300指数 (ShanghaiShenzhen 300 Index)

What it tracks:
The ShanghaiShenzhen 300 Index is a freefloat market capitalizationweighted index that tracks the performance of the 300 largest and most liquid stocks listed on the Shanghai and Shenzhen stock exchanges.

Investment Objective:
The Southern ShanghaiShenzhen 300 ETF aims to provide investment results that closely track the performance of the ShanghaiShenzhen 300 Index, allowing investors to gain broad market exposure to the Chinese Ashare market.

Key Features:

* Trading on the Shenzhen Stock Exchange
* Tracks the ShanghaiShenzhen 300 Index
* Diversified portfolio with 300 constituent stocks
* Low expense ratio compared to actively managed funds

If you're interested in learning more about this ETF or would like to invest in it, I recommend consulting with a financial advisor or conducting your own research to ensure it aligns with your investment goals and risk tolerance.