It was getting dark. Arvin, who had been busy, was burning a steamer and worried about Chen Jiu''s safety. When he saw his safe return, he couldn''t help complaining: "how did you come back? How worried people are about you, don''t you know?"


    "Sorry, sister a Wen, I''m not familiar with the road for the first time!" Chen Jiu quickly apologized.


    "What about tomorrow, can you come back early?" ah Wen scolded, and didn''t even find that she cared too much about Chen Jiu. In fact, she looked at Chen Jiu differently, because excellent men shine everywhere, and he invented the washing artifact, which naturally entered her heart.


    "Sister a Wen, I won''t go tomorrow. Don''t worry!" Chen Jiu suddenly laughed.


    "What? No, aren''t you ready to do it?" ah Wen also stared in surprise. "Although the work is very dirty and shouldn''t be done by you, they haven''t found a suitable candidate in Bishui!"


    "I know I''m still doing this job, but I don''t have to run so far to deal with the dross. I have a new plan. I''m going to build a dross pool and make all the dross there, so as to save me from running so far!" Chen Jiu clapped his chest and boasted.


    "What? Huayuchi, don''t be whimsical. If there is such a good thing, it''s not up to you to build it?" ah Wen expressed strong doubt.


    "Sister a Wen, I also created the washing artifact. Do you want to have some confidence in me?" Chen Jiu blushed when he said this.


    "Jiuchen, how sure are you?" when it comes to the washing artifact, ah Wen also feels that Chen Jiu should be given another chance.


    "Ten percent!" Chen Jiuda said without shame.


    "What? Boasting is not as good as you. If you say 90%, I still believe it. If you say 100%, how can there be such an easy invention in the world?" ah Wen expressed his doubts.


    "Hey, hey, my invention is 100% sure!" Chen Jiu smiled foolishly. He naturally wouldn''t say it. It''s his own invention of plagiarizing human beings on earth. Anyway, no one in the world knows, so he can''t blow it!


    "OK, let''s do the laundry first. We''ll talk about it tomorrow!" ah Wen pointed to the clothes and didn''t bother to argue with Chen Jiu again.


    "OK, I''ll wash it right away!" Chen Jiu promised, and soon came to the two pots. It was hard to scrub. After washing it quickly, he put it into the steamer and said to ah Wen: "it''s hard today, sister Wen. I went out to build a chemical meal pool!"


    "Take it easy, boy. Don''t make me stink here. I can''t wash clothes at that time. I can''t pay the job!" Arvin warned, which also connived at Chen Jiu''s behavior.


    In the clean clothes yard, he found a remote place. Chen Jiu first dug a huge pit, and then left three holes according to the design of the biogas digester. Finally, he led out the gas with a pipe and sealed it, even if it was a success!


    Three holes, one air outlet, one feed inlet, and the last one is the discharge outlet. After finishing, Chen Jiu put the dross liquid with divine bacteria into it to ensure that there is no air leakage.


    It was almost dawn. Chen Jiu simply took a nap on the spot, but soon he was awakened again. Ah Wen and several female workers couldn''t help but gather around curiously to find out.


    "Jiuchen, this is the magical meal pond you worked hard all night to build. Can it really work?" several female workers talked about it, doubtless doubting Chen Jiu.


    "Does it work? Tell you, please remove that word and talk about it later!" Chen Jiu said very smelly, which was full of confidence.


    "Oh, jiuchen, you are becoming more and more confident. If you can really invent this meal pond, you will become a famous figure in the whole temple!" everyone couldn''t help laughing.


    "These little things are nothing. As long as they are easy to use, it doesn''t matter if I''m not famous!" Chen Jiu was very modest.


    "Can''t see, jiuchen, your style is quite noble!" several women couldn''t help but flash their beautiful eyes.


    "Hey hey, sisters, it''s almost time. I''ll collect the dross first. We''ll try it together later!" Chen Jiu giggled and couldn''t wait to collect the dross.


    Soon, more than one bucket of dross was collected. Everyone covered their noses and watched Chen Jiu fall down, but it soon stopped smelling!


    "It''s over?" several women stared at me. I looked at you. They were all very surprised.


    "Yes, it''s finished, and waste is turned into treasure. We can burn fire in the future without those fuels!" Chen Jiu then showed it. He pulled out the pipe and put a little fire on it, "bake!" Suddenly, a faint blue flame burned, and the void changed its shape.


    "This... This kind of flame can burn the void. What kind of fire is it? Even in the alchemy hall, this kind of fire is rare!" ah Wen was shocked.


    "This kind of fire is dross fire. How about turning waste into treasure?" Chen Jiu smiled proudly, full of a sense of achievement.


    "Jiuchen, is your invention stable? If it is really stable, it has made a great contribution to our Yanran hospital!" ah Wen realized that this is a great opportunity and couldn''t help asking solemnly.


    "Stability should be very stable. This bucket of dross should be able to burn for a day!" Chen Jiu looked at the gas concentration in the dross tank and soon came to a conclusion.


    "Jiuchen, you wait here. I''ll invite sister Bibo!" ah Wen then hurried away.


    "Jiuchen, listen to you, there is another amazing invention, which can turn waste into treasure and turn waste into dross. Is it true?" after a while, when they came to Bishui, they couldn''t help being very nervous.


    "Of course it''s true. If you don''t believe it, you see!" Chen Jiu said positively, pointing to the dross pool.


    "Great, jiuchen, please prepare quickly. Go to see the young Lord with us and tell her your invention. She will reward you!" they clapped their hands happily. Bishui wanted to take Chen Jiu to ask for credit.


    "Wait a minute, two sisters, it''s too early to see the little Lord now. I think we should give her a surprise!" although Chen Jiu wanted to see Yanzi, he refused the two women''s proposal.


    "Surprise, what surprise?" asked Bishui, who didn''t understand.


    "Sisters, I hope you can send more people to collect dross with me. What do you think?" Chen Jiu said with a smile: "you know, these things will be free in the future!"


    "Collect dross, what do you want to do?" they didn''t understand.