Counterclockwise Growth Rings

Two eighteen-year-old twins traveled through each other at the same time due to a purple star during the summer vacation after the college entrance examination. When her sister Youwei woke up, she found herself lying in a strange city. The data light belt flows under the feet, the blue neem leaves glow with a cold blue that does not belong to this era, and the loop stretches endlessly but cannot find the exit. This is Zero Domain, the world 132 years later. Here, time is a loop and forgetting is an order. When his brother Jingwei woke up, he found himself lying under the planks of a carriage. Through the gap, he saw the city walls of the Western Han Dynasty, the market of Chang'an, and the people wearing dark clothes. The direction of his travel is opposite to that of his sister - not backward, but forward, not 2025 AD, but 139 BC, the second year of Jianyuan. There is an invisible thread between them. Telepathy, waiting for each other at the cost of silence. Youwei met Xun in the Zero Domain, a system that seemed to know too much and told her the way to go home, but at the cost of "someone will completely forget you." Jing Wei met Dongfang Shuo, Tai Shiling, an astrologer, and an old man selling Hu cakes in Chang'an... He learned to write traditional Chinese characters, learned to bend down and salute, and learned how to survive in this land, but he still didn't know why he came. There is a price to pay for returning home. The price is that some people will always remember it, and some people will completely forget it. "Annual Rings Against Time" - When time goes against the current, can the annual rings find their original starting point?