What is the Chinese equivalent of the sp500?

Could you please clarify for me what the Chinese equivalent of the S&P 500 index might be? As the S&P 500 represents the performance of the largest 500 publicly traded companies in the United States, I'm curious to know if there's a similar index that tracks the performance of the largest or most important companies in China. Is there a specific benchmark or index that investors often use to gauge the overall health and performance of the Chinese stock market?