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In the vast universe, the earth is just a very small marginal planet. In the eyes of cosmic people, maybe we are the savages, and maybe the universe is not only not a peaceful society... But also a society where the jungle is strong and people are divided into three levels. This is the story of a card universe with cards as its core.

"The rarity of the Dragon Scale Ring Stone: D level, the mining difficulty: D level, the mining failure rate is 99%. Do you want to arrange for a miner robot to mine it?" "Yes." "Mining result: successful. Congratulations! The dragon scale ring stone was mined successfully! " Zheng Qin smiled as he looked at the successful mining results that popped up in front of him. Not long after, he put the mined Dragon Scale Ring Stone on the alliance's public trading page. This is already the hundredth rare ore he has put on the transaction page. "You have set the selling price of the Dragon Scale Ring Stone: the selling price is 1 million." "Ding, your Dragon Scale Ring Stone has been purchased, and the buyer has applied for a video chat with you." "Reject!" Zheng Qin said no without hesitation. "Chat declined." On the other side, the man who was refused chatting by Zheng Qin in an understatement twitched the corner of his mouth and looked like he had a toothache. This was the thirtieth time his chat request had been rejected. ... In reality, Zheng Qin, sitting in the "open-top" robot "b43", patrolled the huge mechanical empire he had built. Countless robots are carrying out their respective tasks closely. Who would have thought that a few months ago, he was just a down-and-out interstellar wanderer?

The planet was swallowed by a black hole, and the all-powerful black devil five years ago will leave his planet. Zheng Yang entered the first dungeon planet "Black Mist Star" to look for the third-order white hole sky drive left by his former partner "Xiao Jun". However, this planet is not simple. Traces of several civilizations exist here, including mysterious immortal species, life in black holes, and stone monuments whose history is unknown. Powerful enemies appear one after another, and unknown dangers are approaching. The Wandering Doctor, yes, this is the story of a doctor who lost his home planet and is temporarily unemployed. (There are many future technologies in this article, and there are also witches who have been cultivated. The witches that ordinary people avoid like tigers have become delicious in his eyes.) (Zheng Yang's personal information: Wandering Doctor, Black Demon General, Gamma Sky Drive Academy Preparatory Principal, Dark Island Guardian, Blue Star Lord...)