Qualitative changes can cause quantitative changes. It can also be said where before he would have had to absorb yin cold qi dozens of times, but now even in just twice the time, he could achieve the same result. [TLNote: For sake of accuracy I kept this sentence as is, but I can explain, for example take time X, where previously he needed 12X time to do a Work Y now he just needs 2X time to do a work Y]