Twenty-two hydrogen refueling stations have been built in the province, with daily hydrogen supply capacity reaching 20,000 kilograms, it said.

"Shandong has abundant hydrogen byproduct resources, giving it a leading role in the development of hydrogen energy," said Han Shaohua, deputy head of the department's high-tech office.

The province is working on building smart green ports powered by hydrogen energy. It is also promoting the use of hydrogen in industrial parks and residential communities, Han said.