300 Million Per Month, but Life-Threatening in Another World

I'll give you 300 million per month to use as you wish. But the condition is to become the chosen one and enter a different world every three days to complete the task. If the mission is successful, you will receive additional points as rewards, which can be redeemed for anything. Mission failed, death... Would you like to? Fortunately, as a social animal, Lin Ye was successfully selected as the 'Chosen One'. Science fiction, magic, rules and weird stories... Lin Ye just wants to live and get the 300 million that belongs to him every month. What's wrong with him?