Started Flat: Chosen to Save the World!

Two hundred people from all over the world. They were chosen to go to another world and face the endless tide of beasts. Zombies, behemoths, monsters, even demons. A cycle of seven days. Two hundred people will be added again later! If it fails, one-tenth of that country's population will disappear! Survive and you will be rewarded! Niezhuang was originally a man who was content with the status quo! But he became the first batch of people selected. After seven days, he was the only one left alive. Then, two hundred new people were sent. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.