The main Shanghai Composite Index had fallen more than 30 percent since a spectacular bull run peaked on June 12, raising fears for the wider economy, the world's second-largest.
But the benchmark surged 5.76 per cent, or 202.14 points, to 3,709.33 on turnover of 673.3 billion yuan (USD 110.1 billion). It fell as much as 3.81 per cent and rose up to 6.88 percent during the day, representing a swing of more than 10 percent.
More than 1,100 stocks on both markets surged by their 10 percent daily limits, data from the exchanges showed.
The gains came after China moved to stop "major" shareholders -- those holding at least a five percent stake -- from selling their stocks and launched a probe into short-selling in a bid to calm markets.
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"As China beefs up its efforts to rescue the market... market sentiment is recovering slightly," Qian Qimin, an analyst at Shenwan Hongyuan Group, told Bloomberg News.
More than 1,400 companies have been suspended from trading on China's share markets as of Thursday, representing around 50 percent of listed stocks, according to Bloomberg. The move temporarily averts further falls in their prices, but seizes up the markets.
Heavyweight financial stocks rose. Shanghai-listed banking giant ICBC added 2.01 percent to 5.58 yuan, while Shenzhen-listed Ping An Bank jumped 8.11 per cent to 14.26 yuan.
Asian markets also rose today, reversing heavy morning losses and tracking the surge in Shanghai.