Two shichens passed...
“Damn it! It's only three shichens since I've been standing in this gravity field, but I wasted a lot of energy balancing myself to resist gravity, which pulled me more and more. If this continues, my body will be unbearable!” After another two shichens had passed, the gravity that Zheng-Fu had to bear had increased by three times. It was now as if he had already carried seven times his weight.
In addition to the increased gravitational weight, Zheng-Fu also felt that he had lost a significant amount of energy trying to sustain himself to remain standing.
Five lis away from the gravity field...
“I never thought that this human could endure this long! But in less than a shichen, he would be exhausted. Until then, I'll go help him!” When Hu-Tai-Min returned to the gravity field after finishing his errand, Zheng-Fu was still standing there. It was incredible for beginners and someone with just such an energy level.