The Ice Jade Technique had seven levels, and each of them was tough to break through. Sometimes, a warrior could break through her realm but not the level of the Ice Jade Technique.
Bing Qing Tong and Han Cui were at the level 4 of the Ice Jade Technique. They had stayed at this level for almost ten years. When they stepped into the Second Sky of Spirit Realm, their Ice Jade Technique didn't advance together.
However, after they had been with Shi Yan, they had a breakthrough. At the moment, their Ice Jade Technique had reached level 5.
The Ice Jade Technique had a special feature, due to which it did not always improve whenever the warrior had a breakthrough in her realm. However, once the Ice Jade Technique advanced one step further, the warrior's realm would have a small development.