Although the construction of the sichuan-tibet railway is difficult, China still has to face the difficulties to build the railway, which also shows the strength of China's infrastructure from the side. In fact, this power is now widely recognized by countries around the world. China railway tunnel group has won a contract worth 345 million Swedish kronor (about 257 million yuan) to construct three working tunnels for a subway extension project in Stockholm, the Nordic country, people.com.cn reported on Friday.