A failed investor from 2017 got drunk and woke up in the 1980s. China is just opening up, and the economy is blooming. There is also the dissolution of the Soviet Union, the bursting of the Dot-com bubble and other financial crisis. He used his knowledge of the future and slowly build up his empire.
This book is okay. As the title suggests, it's cheesy and the main hero is, of course, set on making a harem and overall is portrayed as a genius when he's really not.
The premise itself is fun as it's set around 1980 - 1990 China depicting the time when it opened up its borders and the beginnings of capitalism in the country after decades of pure communism. There are a lot of real historic details about China and the surrounding countries, including Soviet Union and how it fell apart as well as history of technological advances and investing.
The story itself is how a man came back in time to his childhood and helped his parents and himself to set up the business in this turbulent era and made use of his knowledge to become a multimillionaire.