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As investigators tried to determine the cause of a bus crash that killed 36 people when the vehicle struck the mouth of an expressway tunnel in Northwest China's Shaanxi province on Thursday, an engineering expert has questioned whether the tunnel design might have posed a hazard.

As mobile internet penetration in China slows, Baidu is excited about the huge opportunity to offer content and service providers a cross-platform distribution channel beyond mobile, into smart homes and automobiles, according to Robin Li, Baidu co-founder and CEO.

As one of the countries with some of the earliest and strongest efforts in developing the new energy car industry, China has seen a slew of outstanding enterprises emerge in the industrial chain. But some difficulties in core technologies including battery power still need to be overcome.

As of the end of June, the work resumption rate of the industry had reached over 90 percent, while all large and medium-sized enterprises in the sector had re-started their business activities, said MOC official Xian Guoyi during an online news briefing on Tuesday.

As of Thursday afternoon, local police said the driver had tried to flee the scene into the countryside, but was later apprehended by police. The cause of the incident is still under investigation.