I'm a Military Research Mogul, Exposed by Changle

In the ninth year of the Zhenguan era, Princess Changle passes away. A sky screen suddenly appears in the Taiji Palace, livestreaming everyday life in another world! Li Shimin: My daughter is still alive, and she's calling an unfamiliar man her older brother? The moment they identify the man, the entire court drops to its knees! Chen Yan is the legitimate heir of a family of military nobility and a top-tier military-industrial researcher. He lives in seclusion at an estate, conducting top-secret research, while the underground base is packed with weapons vital to the nation. He takes in Princess Changle, who has transmigrated from the Tang Dynasty. He only wants a quiet life, but the sky screen broadcasts everything he does. Individual firearms, body armor, tanks and artillery, electromagnetic technology, the imposing sight of aircraft carriers… Modern military-industrial marvels utterly overturn a thousand years of understanding. The Tang court, from fury to worship, needs only one glimpse of this technology! Li Shimin: I wronged the immortal master. Please protect Lizhi! Emperors across the ages: We beg the immortal master to grant us divine weapons to protect our nations! Chen Yan: I just want to carry on my research in peace. Who knew Changle would reveal my wealth and amaze every dynasty across the ages?