Chinese stock markets continue to plunge

The dramatic sell-off in China's main stock market has continued despite efforts by regulators to try to stem the losses.

The Shanghai Composite index plunged 8% on opening, taking the drop in share values to 30% since their June peak.

On Wednesday, another 500 listed firms said they would stop trading their shares in an effort to insulate themselves from the meltdown.

Around 1,300 firms have halted trading, almost half of China's main shares.

John Sudworth reports.