It can be said to be the lifeline of the entire Dongning City!

Therefore, Li Xin also paid special attention to it!

Li Xin also has his eye on the glass industry.

After successfully producing glass some time ago, Li Xin also established a glass bureau to be responsible for glass production.

In addition, Li Xin also instructed the Dongning Manufacturing Bureau to grind lenses and mass-produce telescopes.

Once these telescopes are mass-produced, they will become necessities for the various battalions under the Prince's Guard.

After establishing these industries, Li Xin arrived outside the old city of Dongning.

Looking at the large pile of coal on the open ground, Li Xin frowned slightly, suddenly recalling the scene of spending the winter in Dongning City before the New Year.

At that time, Dongning City had just experienced an invasion by grassland bandits, and resources were scarce and conditions were harsh.

We all endure the long, harsh winter.

Li Xin was unwilling to endure this suffering any longer!

Now, with coal, we have the raw material for starting fires and keeping warm in winter.

After thinking for a while, Li Xin searched through the smart technology section and found two new products.

One of them is the heated kang (a traditional heated brick bed)!

The heated kang (a traditional heated brick bed) is an indispensable facility in every household in Northeast China, ensuring that the people of the region can get through the harsh winter.

With coal available now, making a heated kang (a traditional heated brick bed) is much more convenient and easier.

After finding the blueprints, Li Xin transferred some people from the construction team to build several heated brick beds in the Prince Xin's mansion.

"Your Highness,"

A servant ran over, beaming with joy, and exclaimed, "The heated kang bed is finished!"