I made a chaebol family after my reborn

Lin fen was living in a modern world but because of an accident, he was transmigrated to the HongKong 1970s. When he wakes up, he gets to know that this world is not like his previous world. In this world, some people live secretly. They are martial artists Although this world history wasn't very different from his previous world he determined to build his business empire with his old memories and become the strongest and richest man in the world. But people who control the world from darkness, will they let him become strong? With this situation, will he be able to achieve his goal? This is my first book so there will be errors I hope you guys can help me to reduce errors and make this book successful