Jiebi Martial Arts or Technology?

The mass of the earth is half that of the earth, and the gravity is 1.2 Times. Since the Xia Dynasty, China has been shrouded in a mysterious barrier and isolated from the inside and outside for 4,700 years. Outside the barrier, technological civilization has developed to 2020. Giant steel ships, drones, nuclear bombs, and humans have landed on the moon. Within the barrier, martial arts civilization has evolved to its extreme. The seven realms are from shallower to deeper: iron body to refine the body, true energy to nourish the meridians, unblocking the meridians to turn into strength, condensing the gang to protect the body, forgetting the martial arts to transform, nourishing the vitality and longevity, and returning to the true martial arts saint. The strength can penetrate the body up to three inches, and it can break stones through the air, but cannot fly in the air. Under the center of the nuclear explosion, the Martial Saint cannot completely resist. The wall of low martial arts is insurmountable. In the year 4726 of the lunar calendar, the barrier was loosened. The Guo family went fishing at sea and glimpsed a strange land in the fog. On the same day, a blond and blue-eyed woman from the outside world fell into the water and was rescued. There was a language barrier and civilization was separated from each other by the fog. The walls will be broken. After the door opens, who is the guest and who is the host?