There are all kinds of animals on the surface of the earth. How do their appearance and ecology come from? In fact, there is a department in heaven that is responsible for designing creatures called the "Design Department". They work hard to use their creativity to solve all kinds of incredible problems raised by their clients (Gods). "Why do unicorns actually not exist?" "What are the conditions for delicious creatures?" "Who is the strongest animal in the sea?" All the mysteries of nature come from the "Heaven and Earth Creation Design Department"!