Its 12-layer ceiling has been replaced by a two-layer insulating ceiling.

Its walls have also been built with lagging materials to boost the heat-preserving effect.

The plant succeeded in establishing an air-conditioning system by use of underground water, thus consuming just one twentieth of the energy used in the past. This is enough to provide temperature convenient for work and necessary for ensuring precision in assembling.

In winter 10-15 degrees centigrade underground water is pumped up and thermo-compressed up to 40-50 degrees centigrade to heat the worksites.

In summer underground water is used for cooling them.

This environmentally friendly plant manufactures CNC machine-tools for factories in various fields.