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The Daoist Equal to Heaven, as he passed through Upper Pure Heaven, overheard the Celestial Venerable of the Spiritual Treasure expounding on the "Yellow Court Classic". A flash of spiritual light crossed his mind, and he entered the Biyougong Palace, where, to his surprise, he indeed managed to trick the Venerable out of hiding.
Patriarch Subhuti is, after all, a transformation of the Celestial Venerable of the Spiritual Treasure. Although this sounds rather incredible, there are many reasons to believe it's true. Yu the Great, the last of the Three Sovereigns and Five Emperors, was a disciple of the Celestial Venerable of the Spiritual Treasure and achieved great accomplishments after practicing the "True Scriptures of the Precious Luminaries". The Jingu Bang, originating from Laojun's Bagua Oven, was later used by Yu the Great. The reason why Wukong felt no obstruction when he obtained the Jingu Bang might well be due to sharing the same school of thought with Yu the Great.
