The day Xiao Liang was abandoned by his family, he only took away a gear mark on his wrist.
It is a grocery store that connects the past and present - salt in Changping City is more expensive than silver, and antipyretics can save a life. He started with a bag of salt and turned his canteen into a business empire spanning two time and space. Modern materials were sent to ancient times, ancient porcelain returned to modern auction houses, and a protective halo enveloped the entire city.
When the allied forces of all nations encircled the city for a long time, the coalition commander sneered outside the city: A city trapped for two months would be enough to starve everyone to death. Two months later, the smoke from cooking in the city rose as usual, but the food and grass supplies of the coalition forces were exhausted. They couldn't figure it out until they died - this city's supply chain didn't exist in this time and space at all.
Intent: In troubled times, a city remains standing because of a copper gate. Under the imprint of the gear is the exchange of materials between two time and space, and it is also the support and perseverance between people in troubled times. The smoke in Changping City never goes out because there are people who stood on the city wall until the last moment.