Ji Qinglin used his spiritual vision to barely see clearly the luck of the old man in black when he triggered the thunder.
The name of the technique given by the Divine Consciousness Observation is Cang Qiong Bao Jian.
In an emergency situation, I only understood part of the principle: connect the upper and lower valves, connect the internal and external Qi, use yourself as bait to attract thunder from the sky, and use the enemy to bear injuries and receive punishment from heaven.