The second realm: "I will never regret that my belt has widened. I will be haggard because of Iraq." "refers to persistent pursuit and selfless struggle.
The third realm: "the crowd looked for him for thousands of Baidu, and suddenly looked back, but the man was in the dim light." "Refers to be suddenly enlightened, accumulated and learned.
The above are the three realms proposed by Mr. Wang Guowei, and I hope it will help you.