Just controlling the Horse Form Cannon was difficult enough, but the Horse Form Chain Cannon required continuous power delivery during motion, making it even more challenging. Many people could hit a punching bag with loud thumps while stationary, but once on the ring, punching while moving, they would find it was a completely different matter.
Horse Form Cannon was an entrance assessment for the advanced class of Xingyi Fist, while Horse Form Chain Cannon was a tough point in the professional course, not something everyone could master.
Ran Xiaochuan was a National Martial Arts Sixth Rank student, and choosing Horse Form Chain Cannon was somewhat risky. However, opportunities like this came only once, and he didn't want to miss it easily.
The first punch, he borrowed power quite well.
The second punch, his center of gravity was somewhat off, and he lost some control of his body when rushing out.