Lost in the Gray Sea

In urban rebirth, I have the "Heaven and Earth Happy Travel" system! Hai Tianwu, an ordinary college student living in Harbin, China, was devastated after breaking up with his online girlfriend one day. But unexpectedly broke through the world lock! Awakened the system! What? Doesn't system upgrade require ten thousand taels of gold? Just need a train ticket from Harbin to Jishi that I have personally taken? What? After unlocking the system, you can actually travel thousands of miles a day, faster than Bolt, and faster than Maybach? From now on, the end of the world is only a short distance away! The world is free for me to roam! Haihu, an ordinary college student, has been cheating in the world with the help of the system. Become a business wizard who makes money every day!