Radio Free Asia reported that 37 bridges have collapsed in China since 2007, including the last one, Yang Ming Tan bridge in Haerbing, which collapsed on August 24. The incidents have made people wonder about the quality of China’s bridges, but experts believe that the collapse of the bridges was caused by overall mismanagement, including using substandard materials, excessive sand mining near the bridges, and overloaded trucks (driving on the bridges). Another contributing factor was the lack of openness in the official reports of the investigations of the incidents, as most of the reports focused only on the accidents themselves. According to Radio Free Asia, therefore, there is lack of public supervision, .
Source: Radio Free Asia, September 12, 2012