The Rebirth of a Martial Arts Master: Diary of a Gangster

After the modern eighth-level grandmaster Sakuraguchi successfully challenged the 100-man kumite, they were both killed by an explosion. He traveled back to the body of Sun Meiyao, a gangster from the Republic of China, and awakened the space system's ability to open portals. Just after time travel, he caused a train robbery that shocked the world. After that, he traveled to Sakura Country to kidnap the Emperor of Sakura Country and forced the Sakura government to cede territory and pay compensation. If you dare to study bacteriological weapons, I will open the door of the bacteriological weapons laboratory directly to the capital of your country. Let you threaten our country with atomic bombs and directly kidnap Einstein. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.