Infinite Time Travel: Song Dynasty 1127

I was stuck on an interesting question before: modern people travel to the past and do many "little things" with their cleverness, which may be fatal in the long run. For example: 1. Rushing to invent and create: thinking that by making soap and cement, you can become rich, but you ignore that without the protection of business and power, the formula will be swallowed up by the powerful in a blink of an eye. 2. Blind spoilers of history: If you say "The Golden Soldiers are coming soon" when you meet someone, you will most likely be regarded as a lunatic who is deceiving others, rather than a prophet. 3. Use modern thinking to enforce ancient rules: If everyone is equal on the streets of Bianjing, I am afraid that I will not be able to survive for an hour. So I would like to chat with you book friends: In your opinion, what is the most deadly "little thing" that you should not do when you travel back to the sixth year of Xuanhe (or any other historical period)?

Some of the words were written in the author's remarks. After thinking about them, I finally decided to take them and put them here. I chose the sixth year of Xuanhe (1124) to start the chapter. I am actually fascinated by this moment. You know that a storm is coming, but the old tree in the yard is still bearing green leaves before the storm comes. In the first month of this year, the envoys of the Jin Dynasty came to Bianjing to celebrate the New Year. Huizong gave a banquet, during which they discussed the newly acquired jade articles. Thousands of miles away in Yanshan Mansion, the surrendered general Guo Yaoshi was training his "Victorious Army". The craftsmen in the south of the Yangtze River are still firing the azure glaze of the Ru kiln. The crackling sound is soft, like the cracking of spring ice. In the spring, Meng Yuanlao began to write "Tokyo Menghua Lu". He said in the preface: "I am afraid that if it is soaked for a long time, those who discuss its customs will lose sight of the facts." What I want to write about is this year standing in the cracks of time. On one side is the never-fading green in "A Thousand Miles of Rivers and Mountains", on the other side is the longer and longer shadow cast by history. I want readers to see how the people on the deck initially fell into the water when a giant ship began to tilt. Standing on the threshold of the sixth year of Xuanhe, looking back is the magnificence of the Zhenghe period, and going forward, it is the snowy sky of the first year of Jingkang. I think this position is just right, Brother Yu. You can just hear the subtle but fate-determining sounds that a civilization makes before it breaks apart. Finally, I want to say something: if we go back to this era, how should we make up for such a huge regret? Brother Yu, let me go first and give it a try.