The nearest place from Hainan to Guangdong is only 19 km. Why hasn't a cross-sea bridge been built so far?

According to the research report released by the expert group, if a cross-sea bridge is to be built between Guangdong and Hainan, the best place is Qiongzhou Strait. The research report shows that Qiongzhou Strait is close to the north and south, which is the most suitable place to build a sea-crossing bridge along the coast. Qiongzhou Strait is the nearest place between Guangdong and Hainan. The average width from north to south is only 29 kilometers, and the nearest width is only 19 kilometers. Therefore, in the research report, the expert group believes that building a sea-crossing bridge in Qiongzhou Strait is the most economical scheme.

Since 1990s, this plan has been put forward many times. Unfortunately, this plan has not yet been implemented. There are many reasons. Hainan Island is very important in the national development strategy. This is the first one in China? International tourist island? This is an excellent tourist attraction in China. Therefore, tourism is Hainan's pillar industry, and ecological strategy is Hainan's fundamental strategy. Taking tourism as the core is the knowledge formed by Hainan society. When inspecting Hainan Island, the leaders stressed that Hainan Island is the treasure island of the country and should not cause environmental pollution on Hainan Island under any circumstances.

Due to the instructions of the central government, the Hainan Island government is not allowed to establish large mining enterprises, and the number of industrial enterprises is also controlled at a very low level. Therefore, there is no busy industrial logistics between Hainan Island and the mainland, and there is no need to transport mineral resources and industrial products from Hainan Island to the mainland. Therefore, the necessity of building a cross-sea bridge is greatly reduced. The continuous hot air blowing from the East Pacific also causes the area affected by tropical cyclones to be south-west than normal, so Hainan is the first area affected by tropical cyclones, which leads to the accumulation of typhoons and will flock to Hainan in 2020.

These reasons will bring difficulties to the construction of Qiongzhou Strait Bridge. At present, the Hong Kong-Zhuhai-Macao Bridge can withstand an earthquake of magnitude 8 and a typhoon of magnitude 16, which is the most serious typhoon in the world. If the Qiongzhou Strait Bridge is to be built, it must be able to resist earthquakes of magnitude 9 and typhoons of magnitude 18 or above. The physical limits of suspension bridges and cable-stayed bridges are difficult to reach. With the upgrading of engineering materials in the future, it may be possible to do this one day, but the risk is too great now. At present, Vietnam still occupies 30 islands and reefs in the South China Sea; The United States also likes to visit the South China Sea. Considering national defense security and maintaining China's Nine-Segment Line, Chinese warships need to directly protect China's maritime rights and interests through Qiongzhou Strait. Once the cross-sea bridge is built, it is easy to be attacked.