Next, Li Er also knew what copper smiths bought by Yang Heng’s family. Li Er also intervened. How did he intervene? He naturally knew which one was convicted again, so he secretly reminded the butler of the Yang Heng’s family, so that the butler could buy someone in the first time. Even if the others were arranged by Li Er, they would be warned. Otherwise, the butler would know, and it would be difficult to say what they could buy.

I don’t know where Li Er is so interested. He always cares about everything about the Yang Heng family. Just now, the biogas pool of the Yang Heng family bleed out, and Li Er knew it.

"What? Take a pile of mud from the mud pond as seeds, and throw it into a pool with feces, weeds and leaves. Then a whole of burnable gas is produced from it, and it is the same as the gas in the mud pond. So, does that kid master this gas?" Li Er widened his eyes and listened to the report. "No, I want to go and see it myself." "Your Majesty, you don't need to be yourself. Have you forgotten our two precious girls? They were also a little wild some time ago and kept talking about something about the little lady. Otherwise, let the two sisters go and see it, and then come back to report to you."

"No, they are both big girls, how can they show up in public? No." Li Er opposed it, but the more he said, the less confident it was. This was not to let the two of them go to see others, but to play with Xiao Niang, which seemed not to be showing up in public. "Your Majesty, why is this showing up in public? You must know that Xiao Niang is the best friend of the two of them and the classmate of the two of them." Changsun understood and solved the problem for Li Er. This is the reason why the two sisters appeared in front of Xiao Niang and Yang Heng. Since they had to see the biogas lamps, biogas stoves, etc., naturally, Yang Heng had to explain it.

When they entered the door, they naturally said that after they shouted, they all stuck out their tongues. Has it been held back for a long time and they were a little bored? Otherwise, how could this be?

"Two princesses, you see, this is the biogas lamp. During the day, we can only see a light blue flame, which can only show its effect at night." Yang Heng unscrewed a valve on the side, and then lit the torch with a source of fire. It burned like a gas welding gun.

"Also, two princesses, you see, this is a biogas stove and the biogas lamp are exhausted. It's just a pot on it, and there is a shelf on it."
Chapter completed!