Besides improving himself, Bai Zemin really needed Nangong Lingxin to become as strong as possible in the shortest possible amount of time. Her Energy Barrier skill was very valuable to Bai Zemin as her defense was even greater than Shangguan Bing Xue's ice creations. The more powerful Nangong Lingxin became, her usefulness to him and the amount of help she would be able to give him in the future would increase accordingly so no matter how Bai Zemin looked at it there was nothing to lose.
Nangong Lingxin's eyes sparkled with gratitude as she looked at the young man in front of her. She was fully aware of how important this bridge was to Bai Zemin, a single mistake meant that they would all have to turn around to go back the way they came and thus find another way.