Which main characters of the Ming Dynasty fictional novels traveled to the Ming Dynasty through the space-time machine?

When the main character arrived in the Ming Dynasty, he transmigrated to the battlefield. He was Wu Sangui's brother. He remembered that in order to save Chongzhen, he fought his way out alone. In the end, Chongzhen hanged himself. The protagonist also found a treasured sword at sea, which was said to be able to cut through iron like mud. He also brought a pistol with him. When he ran out of bullets, he also designed a scope for the cannon. That was all he remembered...
The beginning plot is similar to the story of the search for Qin, right?

Answer 1

I recommend "The Historical Infinite Circulation System." The protagonist, Li Ziye, transmigrated to the end of the Ming Dynasty and became the host, Qi Han. He relied on the system to survive in the Ming Dynasty and lived a beautiful life without shame. If you like this kind of fictional historical novel, this book will let you have a time travel addiction ~ I hope you like this fairy's recommendation, muah ~😗