“The world’s current population is 6 billion. A person can meet in his lifetime the number of people in this dome, 45 000 people. And within that number, he can remember the names of 3 000 people. The number of people he can recognize the name and the face is decreased to 500. The people he can call as friend is only 30. As for his closest friend, it’s the same number as the ones here on stage, 5 people.”