First, technical problems. Because Japan developed and utilized hydrogen energy earlier, most of the patents are in Japan's hands, so other countries will face many technical barriers and problems when developing, which other countries are unwilling to face.

Second, security issues. Although the efficiency of hydrogen storage and equipment is very high at present, the technical problems that cannot be solved at present are the leakage and hydrogen explosion of hydrogen storage equipment after encountering high temperature or collision.

Third, the issue of supporting infrastructure. At present, compared with ordinary gas stations, the investment of hydrogen refueling stations is relatively large, and they are also faced with the problems of transporting hydrogen and supporting facilities and equipment for hydrogenation.

Fourth, it is still a cost issue. The above three factors lead to the high cost of hydrogen production, hydrogen storage, hydrogen transportation, hydrogenation and supporting equipment, which has no advantage compared with other new energy sources.

In contrast, China has huge hydropower resources, desert resources (which can also be converted into wind and solar energy resources) and UHV transmission technology. Moreover, the cost of charging equipment is much cheaper and more convenient. Therefore, hydrogen fuel cell is only a part of the experimental development direction, and new energy sources such as photovoltaic, wind power and lithium battery have become the main development mainstream in China.