This is just really badly written. The prose is clunky and awkward, and it skips over a lot of stuff that should have been given the time to get a decent description. The characters are one-dimensional, everybody over-reacts to everything and we are told about important things happening without them ever being described, even when they happen right in front of the protagonist. One example is a conversation between Long Chen's wife and the head of his clan, where she defends him in a conversation filled with 'subtlety, barbed words and hidden meanings'. The only problem is that we never read a single line of dialogue from that conversation. We are just told that it happens and that it was like that, and given how clumsy and cliched the dialogue is in this story, it's a little hard to believe that.
Seriously, this important, devious battle of words happens in front of the main character and we don't get more than a single line telling us that 'it happened'? Generations have gone by with nobody being able to unlock the power of this cube, yet Long Chen and his wife do so in a few minutes, with the most obvious idea that literally the first person to summon the cube should have come up with themselves. Add in the fact that his wife keeps talking about how great he is in bed and I spent more time rolling my eyes than actually reading.
Seriously, skip this one. Pretty much any LitRPG book should be better.