The strength of the Qi Martial Realm mainly depended on the number of Qi vortexes activated.
One was at the early-stage Qi Martial Realm if he had 33 Qi vortexes. One was at the mid-stage Qi Martial Realm if he had 66 Qi vortexes, and one was at the late-stage Qi Martial Realm if he had 99 Qi vortexes.
After activating 100 Qi vortexes, he would be at the Major Perfection Qi Martial Realm.
As for those below 33 Qi Vortexes, they were all considered entry-level.
Although Xiao Shi had only activated one Qi vortex, he had activated the Lunar Qi Vortex. It was stronger than ordinary Qi vortexes. According to his estimation, the power of one Lunar Qi vortex was almost comparable to four ordinary Qi vortexes.
After he expanded this Lunar Qi vortex with his secret technique, the Vortex Expansion Technique, he could fight all the early-stage Qi Martial Realm cultivators below the eight ordinary Qi vortexes with just this Lunar Qi vortex.