Bringing Military Supplies to the Great Ming

Yang Dong, along with a military supplies warehouse, 'transmigrated' to the Ming Dynasty, and the 'Tumu Fortress' incident was about to happen. What to do? Go with the flow or change history? With so many resources in hand, Yang Dong's good life began. A cross-era inventor? The advent of electricity and cars. A landmark literary giant of the era, the author of 'The Legend of the Condor Heroes', 'The Flying Dagger Li'. A brilliant composer, leading the fashion trends. The song 'Tan Qing Shui He' by the Second Master is not only popular now, but the truth proves that it's the same in any era. A weapons expert? Something like '819'.