BEIJING - China's bluechip-tracking Hushen 300 index changed its sample on Monday to include more growth stocks.

While financial and real estate shares remained as most weighted, growth stocks such as Wanda Cinema Line and technology firm Ourpalm were also added to the index, increasing the weighting of IT and emerging industries.

On the other side, a number of resource shares such as Yunnan Copper and Yang Quan Coal were removed from the index. A total of 20 stocks were changed.

The index tumbled almost 20 percent in the second half of 2015 after the stock market fluctuations, with manufacturing, raw materials, and the energy industry falling the most.

Ping An Insurance remained the most heavily weighted stock, accounting for 4 percent of the index. The top ten shares, all except CRRC Corporation in finance and real estate, account for 21.37 percent of the index.

The Hushen 300 Index is the key bluechip-tracking index in China's A-share market. A number of of exchange traded funds and index futures are traded based on the index.