The Well in My House Leads to Another World

After retiring, Lin Hang had no choice but to return to his hometown in the countryside. He accidentally fell into a well and accidentally discovered that the well was connected to another parallel doomsday earth world. So Lin Hang began to trade between the two worlds, step by step to reach the peak of the two worlds. There are people on earth who are studying the doomsday virus to prepare for the end of the world a hundred years from now.