Underneath Five Elements Mountain, already a century had passed.
For Buddha Ancestor to demonstrate compassion, he assigned the Five Directions Kaide to guard beneath Five Elements Mountain. When Wukong felt hungry, they would feed him iron pellets; when thirsty, they would give him copper juice to drink. Pressed under Five Elements Mountain, Wukong had almost completely lost his mana and found it difficult even to fast. He had to drink copper juice every half year and eat a few iron pellets. Tathagata was truly ruthless, making him unable to fast, barely surviving half a year Max. Without food, he might have become the first Da Luo Golden Immortal to starve to death.
Helpless, Wukong had to eat those iron pellets and drink copper juice every half-year. Fortunately, he had refined Vajra Invulnerable flesh in Old Lord's Eight Trigrams Furnace, which allowed him to munch noisily on the iron pellets before swallowing them, and the copper juice was digestible as well.