In the 20th century, why did China list fast reactor technology research as the largest project in the energy field of this plan?

By 2050, China's energy gap will reach 654.38 billion tons of standard coal. People have realized that the extensive use of carbon-based fuels has become one of the important factors of environmental pollution, and accelerating the development of nuclear power, including fast reactor nuclear power plants, is one of the important ways to solve the above contradictions. China also attaches great importance to the development of fast reactor technology and has received strong support from relevant authorities. 1987 fast reactor technology research has been listed in the national "863" high-tech plan and the largest project in the energy field. It is planned to build a fast neutron experimental reactor with thermal power of 65 MW and electric power of about 20 MW in the near future.