Are there any classic sci-fi novels that I can recommend?

Traveling through the Xianxia world, Chen Chen obtained the strongest tracking system and was able to track everything ever since. Chen Chen says, "System, I am short of money." "Two meters away, your father has hidden some money under the bed. Five meters away, there is a rusty copper coin buried half a meter underground." "There is a nugget of silver in the grass ahead." Chen Chen says, "System, I need some luck." "The feces in front of the pigsty is not ordinary." "Go to the Black Peak cliff ten kilometers away and jump off it." "There is an Immortal Cave Abode hidden somewhere, please explore it on your own."

[Alternative tittle: I Can Duplicate Everything] One day, a friend asked him, "Brother Qin, why aren't you cultivating?" Qin Yi smiled gently and said nothing. Cultivating? Why should I cultivate when I can extract Cultivation Points from you? With Cultivation Points, I can upgrade my cultivation base at any time. Not only Cultivating Points, but I can also extract your Spiritual Mind, Body Essence, Artifacts, Pills, Bloodline, Special Physique, and others. So, tell me, why should I cultivate?

A chance to change, challenge destiny, make dreams a reality, and live a legend! A regular man gains a system that allows him to turn into a fish! In the modern world, a young man gains an unconventional system that gives him the power to transform into a fish! With this strange power, he shoots for the stars!

Qin Lin was playing a nostalgic game called “Ranches Story” when he was electrocuted. He suddenly discovered that he had the ability to enter into the game. He could even bring a watermelon he had planted in the game back to reality. At first, his plan was to sell watermelon for 2 yuan a catty. In that case, he could earn 20,000 yuan by planting 10,000 catties worth of watermelon in the game every day and selling them in reality. Later on, he discovered that by leveling up his ranch, he could obtain high quality crops that surpassed that of the real world. If he reared livestock, they were of far higher quality than that of reality. After he built factories, he obtained various recipes that far surpassed that of the real world. Everything changed after that.

Lin Qi transmigrates to a world of immortals. In this world, there are sword immortals who can behead a person from a thousand miles away, peerless great demons who burn mountains and boil the seas, and ancient gods and devils who can divine the heavenly secrets. As a disciple in charge of miscellaneous chores in the Skysword Sect, Lin Qi doesn't have any cultivation talent. A hundred years had passed in a flash, and seeing that he has nothing to do with such a great world, Lin Qi is incomparably depressed. Just as he is about to die of old age, he suddenly awakens a cultivation system. Unlocked One-Click Cultivation System: Limitless cultivation speed boost, one major realm per second! Unlocked One-Click Technique Practicing System: Cultivation technique instantly maxed out. Cultivate 10,000 techniques at the same time! Unlocked One-Click Clone System: 100% of the actual body's strength. Can self-destruct, can teleport, can fuse! As a result, Lin Qi begins to cultivate again with his hundred-year-old body, becoming invincible under the heavens.

Locke, an ordinary middle school student from Philadelphia, traveled to a world of sword and magic and became a small lord. However, his territory was barren and narrow, and the leading people were poor and weak. Around him, there were ferocious brigands, terrifying dragons, and powerful enemies. At this critical moment, Locke had awakened the ability to summon the gods! At his summon, the powerful and mysterious strength came to this world one after another! Athena, the beautiful and intelligent war goddess! Venus, the goddess of love! There was also Hades in charge of the nether world, and the cunning god of tricks Loki! Countless gods and their heroes followed Locke to fight. They built their own territory and made it a sacred place that everyone yearned for in the world. They also made Locke the greatest ruler of the world! Magic dragon, phoenix... The powerful and mysterious magical beast became Locke's ride! The burly giant, the beautiful elf, and countless mysterious creatures had become members of Locke's group. There were also countless mages and knights who were loyal to Locke and became his spears and shields! And charming Venus, youthful Daphne, cold Medusa and enchanting Pandora... Their styles were different, but each of them was beautiful and charming. Locke also showed his powerful strength on another battlefield, which made these goddesses and female demons shout, "Slow fuck." This made Locke the prince charming of countless girls. However, Venus, Daphne, Medusa, Pandora and other goddesses and female demons held Locke tightly and shouted, "Locke belongs to me!"