Xiao Shu hurriedly left with the crystal stone just now, not to build a telescope, but Tang Ming told him to go back and prepare two built gas lamps first, and he would show them to everyone when it was dark.

The arrival of Li Ba brought a large amount of copper to Xiao Shu, and the copper material here on Weihai Island was used as a gas pipeline for biogas, and there was little copper used to make gas lamps.

Lack of materials to produce, Xiao Shu almost lost his gray hair, and now that the materials are here, Xiao Shu can continue to work. Tang Ming gave him the task of at least 200 gas lamps, which had to be made before the biogas digester was completed.

It's no wonder that he was excited when he heard Tang Ming let him continue to go back to work.

After dinner, night had fallen, the sky was full of stars and a round moon, emitting a silvery white light, and the high ground of the first digester was densely packed with people. A makeshift platform rises in the center of the site.

A huge gas lamp without a glass cover on the table is hoisted high, there is no so-called gas storage tank, only a simple lamp head, a gas pipe directly connected to the lamp head, and a valve is used to control the amount of gas delivery.

It is also a switch to adjust the brightness of the gas lamp, and the wick is made of mesh bags woven of asbestos to ensure that it will not be burned off by biogas. Tang Ming was standing next to the gas lamp at this moment, stepping on a stool more than a meter high at his feet.

Standing at the front of the stage were Fang Xiaoru, Li Ba and Xiao Shu and others, their arrival had long been expected by Tang Ming, and to Tang Ming's surprise, Chen Jialan was also among them.

Since Chen Jialan misunderstood Tang Ming last time, he was like an ostrich, hiding in his house and easily refusing to step out of the door. Since I landed on the island, I may have just come out and walked around tonight. The little red face beside her was full of curiosity, and her big round black eyes stared at Tang Ming who was about to light a fire on the stage without blinking.

This little girl has not heard many people around her mention recently, Tang Ming has built a magical biogas digester. If you bury some excrement in the ground and connect it with a strange copper pipe, open a valve called something, and something called biogas will come out, and you can burn it with a little fire.

I heard that it is very convenient to use this thing to cook vegetables and rice, and it is no longer necessary to use dry wood to burn. There is such a thing, and for those of them who have to cook every day, they are naturally very curious.

If Tang Ming could understand the idea of this girl at this moment, maybe he would change the role of promoting biogas to whom. For example, when he first tried biogas, he should have called the cooks to the site to see how it can be used to show them the benefits and benefits of biogas, which might be much better than the craftsmen.

"Miss, Miss, you say this thing can really be used for cooking?" The little girl curiously tugged Chen Jialan beside her, and the other little finger pointed to the gas lamp on the high platform and asked repeatedly.

Chen Jialan looked at the curious Xiao Ding, smiled bitterly and shook her head, she wouldn't have come tonight, it was Xiao Ding, the girl who called her here. She had also heard of Tang Ming's ignition test last time, and she was also very curious about biogas.

But when it comes to understanding, maybe she is even more confused than the little tinker next to her, and she won't know how to answer this by the little tinker who will ask her non-stop. In a daze, Chen Jialan suddenly saw Tang Ming smiling at him from the corner of his eye.

At this moment, Chen Jialan's heart suddenly beat violently, since the misunderstanding that night, she didn't know why she felt very shy once she thought of Tang Ming. Even Tang Ming's polite nod of greetings just now would make her dare not look at her.

If you want to return to the previous down-and-out self, it seems that this has become impossible, when Chen Jialan is annoyed that he is too uncourageous, at the same time, there will be a trace of sweetness in his heart.

When she couldn't see Tang Ming, she would always have his appearance in her mind from time to time, but when she met her, she was so ashamed that she couldn't raise her head, this kind of contradiction made Chen Jialan feel very confused.

Although Tang Ming on the stage was very strange about Chen Jialan's performance just now, he obviously saw that her eyes met with him, but he didn't look at himself like before, and he didn't even smile politely, so he pretended not to see himself.

"Is she still angry about the misunderstanding last time?" Tang Ming couldn't figure out why Chen Jialan behaved like this, so he could only guess randomly.

Looking at the crowd gathering more and more in the audience, Tang Ming looked up at the night sky, the time was almost the same, and it was time to light the fire. Tang Ming nodded slightly to the guards beside him, and the guards walked into the front of the stage with understanding, and suddenly shouted loudly: "The auspicious time has come, start lighting the fire." ”

The crowd on the entire plateau instantly fell silent, holding their breath and waiting for Tang Ming to surprise them.

With a confident smile on his face, Tang Ming slowly raised the lighter in his hand and put it under the net bag of the wick. The other hand was placed on the valve below and turned gently, and the sound of swamp gas began to flow in the 'hiss' copper pipe, and with the feeling of opening to the appropriate airflow, Tang Ming did not hesitate to light up the lighter in his hand.

The "boom" valve was still opened too much, and at the moment of ignition, a large fire erupted from the entire gas lamp, almost surrounding Tang Ming's entire person. Tang Ming, who was startled, was so shocked that he took two steps back in a row, and almost fell off the bench more than one meter high.

Fortunately, the ball of fire was only flashing, and Tang Ming's hand was only burned with the lighter, and he was not injured in other places.

The huge gas lamp was already burning at this moment, and the heat wave rushed towards Tang Ming with the breeze, and after a while, he was roasted and sweated profusely. He could no longer stand by him, and hurriedly jumped off the bench, and the guards who had been watching him at two moments immediately rushed up and helped him back.

The huge wick mesh bag was 50 centimeters in diameter, burning with red firelight, and there were only a few torches on the stage that served as temporary lighting measures, but at this moment, under the illumination of the gas lamp, the darkness of the night was instantly replaced by light.

The distance between the gas lamp and the ground is more than three meters, and the light emitted is centered on the high platform, covering more than 20 meters away. Looking at the gas lamp that was burning like a sun, the crowd of onlookers suddenly erupted in exclamation.

At this time, Tang Ming, who was already about to retreat to the audience, suddenly broke away from the two guards who were supporting him, rushed to the valve of the gas lamp again, grabbed the valve with both hands and began to rotate slowly.

As the valve was slowly unscrewed and the amount of gas delivery increased, the flame burning from the wick gradually began to fade from red to blue, until the fire completely became white and blue, Tang Ming nodded with satisfaction and let go of the valve with both hands.