Build a Teahouse in the World of Conan

Conan fantravelled through time! When Zheng Hua woke up, he found that he had traveled to Tokyo, Japan. He thought it was a two-dimensional world, but he found that it was indeed a two-dimensional world, but it was just a world of science. Zheng Hua, who was neither a forensic doctor nor a police officer, and had just made a feud with a winery because of time travel, thought about why he didn't build a teahouse. Let's see how Zheng Hua set up a teahouse and wandered into the world of Conan!