As a part of his training, Yue Fei began to stare directly into the morning sunrise. At first the training was hard because the bright sunlight hurt his eyes, but he continued to practice the skill of the "far-sighted person" for many years. One day, Zhou came to Yue Fei and pointed to an object high up in the sky. When he focused his trained vision, Yue saw that it was a lone goose. Zhou then directed Yue to scan some trees that were one hundred paces away. Yue again focused his vision and caught sight of two black cicadas on a tree. Zhou then laughed in approval and said "Now that your eyesight is practiced, I not only accept you as my student, but also as my adopted son. I will now teach you martial arts."