Salesfell by about 55% to 1.39bn yuan in the first six months of 2013, the troubled wind turbine manufacturer said ina Chinese-language statement on the ShanghaiStock Exchange.

TheChina-wide decline in new turbine installations in 2012, triggered by gridcurtailment and the government’s failure to promptly pay subsidies, has hampered Sinovel's business along with its competitors.

But Sinovel has also been left reeling by a host of other issues.

In