Grandmaster Xu Guanyu did not lie about the technique. Even during the cultivation, his mind was at peace. The worries about his team facing danger were gone, and his concerns about the God Order and the Nirvana Alliance were also gone. He achieved a peace of mind.
The sensation was addictive, and he went on. He forgot the time as he kept breathing, following the Essence of Tranquility Breathing. He absorbed even more energy, and the absorbed energy became stronger and purer.
Tang Shaoyang thought he was ready to open the first meridian because of how strong it was. He quickly found the answer that it was still not enough. There was this feeling that told him it would take him a while before he could open the first meridian. He did not force it, patiently doing the breathing.