Du Heng and Wu Buwei didn't stay longer than necessary. After giving a brief explanation of the patient's condition, they immediately drove off.
Throughout the journey, there were several times Wu Buwei wanted to ask something, but he always held back at the last minute.
This hesitation clearly bothered Du Heng, who finally said, "If you have something to say, just say it. Your fidgeting is making me uncomfortable."
Wu Buwei glanced furtively at Du Heng's expression. "Senior brother, why did you needle CV-01 instead of Baihui (GV20)?"
"The patient had summer-heat and dampness tangled in his chest, preventing yin qi from ascending and yang qi from descending. This meant Yin and Yang couldn't connect and circulate. CV-01 and Baihui (GV20) are Yin and Yang acupoints, respectively, and both can balance Yin, Yang, qi, and blood. So, either would have been suitable.
