What was the name of China’s major equity-market turmoil that began after the Shanghai Composite peaked in June 2015?

The 2015–2016 Chinese stock market turbulence began after the Shanghai Composite peaked in June 2015.

Chinese share prices had risen dramatically during the preceding year, encouraged by retail participation, margin lending, and expectations of continued economic growth. The Shanghai Composite reached a major peak on 12 June 2015 before falling sharply over the following weeks.

Chinese authorities responded with measures including trading suspensions, restrictions on some share sales, and support for major companies. A sharp fall in August 2015 intensified international concern about China’s economy and its effect on global markets.

The episode is sometimes called the 2015 Chinese stock-market crash, but the broader Wikipedia title covers the continuing turbulence into 2016. It was an equity-market crisis, not the same event as the 1997 Asian financial crisis.