If someone wants an actual short review that has nothing to do with Qidian ****ery here you go.
This novel is fantastic. It’s easily in the top 3 of webnovels I have ever read. It’s setting is greatly fleshed out and interesting. Unlike other authors who refuse to fully imagine what the future would look like or those who just leave it as “basically nothing changed except haha realistic VR”, this novel goes all out in its setting. Set in the far future, humans have gone very far, but not unimaginably far (a 'problem' most people have with ScFi). They successfully survived the singularity (though its not mentioned as such) as the super intelligent AI created is on humanity’s side. This is not just a plot point to justify a few events, but she (spoiler) is a real, major character who has character development. The countries of the past have (realistically) either evolved or disappeared and are replaced by new ones. A point to note is while there are people with super natural powers on earth at the beginning of the story, they are not cultivators. The people on earth have powers they were born with that they advanced, not powers that anyone can obtain through hard work. Cultivation is something introduced to humanity from the other world 'game', bolstering humanities combat powers.
The MC is from the future, which many readers dislike, but it actually feels like it in this novel. The MC is a genius Engineer who helped humanity evolve there technology to battle against their enemies. He is also an expert in the other world that humanity enters. Now you may think this is very annoying, as he sounds like a protagonist who can do anything. The thing is, he can not. His knowledge of the future only really helps him 3 whole times before future events change too much for them to be of any use. His status as a genius on earth is quickly realized, but future events move forward too fast and prevent him from taking much advantage of his future knowledge, as he is basically forced to carry humanity through events that they were originally supposed to have time to prepare for. This means he is always working very hard and is often barely able to win most battles (he actually struggles). His position as a previous life expert isn't very helpful in the other world either, after a while, as though it does help him be recognized as talented, the many events playing out happen when he is too weak to handle them using his own power (as its a cultivation world), forcing him to plan and scheme. This is a harem novel but the MC isn't an idiot. You can think of him as someone like the MC of tales of demons and gods, but way less dense. He loves the main heroine a lot and proactively tries (and succeeds) in dating her, but he still cares greatly about other the other females around him, his master in the other world and the princess of one of earths major nations. The only real complaint that could be had is that this novel had basically no SoL, he is always doing something and events happen one after another. There is obviously bridges between them, but he doesn't really have points where is relaxing, as he has to manage to worlds and not just one. I would personally prefer for the MC to have some down time where he just sorta hangs out with his friends (who actually exist and are rather important) and girlfriend(s). If you have any questions about the novel feel free to ask as I have read up to chapter 500 on the other site.