Hire a transmigrator with the system and five sisters-in-law.

I, Zhang Jing, am a modern-day person who worked hard for months without success. I suffered a sudden heart attack and died instantly. Zhang Jing was reborn in the ancient Yuan Dynasty, a time of famine and drought. There was no food or water to eat or drink. He transmigrated into a dimensional system with a modern, inexhaustible arsenal of weapons and equipment. He was reborn into the body of Zhang Jing in ancient times, who had five beautiful sisters-in-law. His five brothers all died of starvation and malnutrition, leaving only Zhang Jing to take care of them. He also planned to build a state-of-the-art, unlimited food and construction equipment warehouse. He planned to build a state-of-the-art, secret military base integrating the three armed forces: the army, navy, and air force. Within the secret base, he would establish a production line for all types of weapons and ammunition, various models, and the production of a fifth-generation stealth fighter jet and several other models. Heavy-light-transport-arms attack helicopters of all types and varieties, and produce guided and unguided missiles, including fighter-mounted weapons and warship-mounted weapons, and other types of attack helicopters, including guided and unguided bombs dropped from fighter-mounted aircraft. The system shop has a wide variety of products for purchase. Small stones, 1 tael of silver, and other valuables can be used to purchase items in the system shop. The system can unlock production lines and many other necessary items. He planned to build a second round of weapons and pharmaceutical research centers, as well as many research centers, including a hospital.