The last were martial arts like Tong Bei Quan, Tai Chi Fist, and [Twelve-Road Tan Tui], or vehicle handling skills such as [Vehicle Driving] and [Riding], and even ranged attack specializations like [Shooting] and [Hidden Weapon Throwing].
It is worth mentioning that after fully mastering the Yijin Jing and Xi Sui Jing, Li Ang found that these two skills were not suitable for fusion at present.
The main reason was that Li Ang hadn't reached a high enough level of mastery; though his Yijin Jing had already reached the Grandmaster level, his Xi Sui Jing was still only at the Mastery level.
Li Ang estimated that only when both skills reached the Grandmaster level, or even the higher Perfect Level, would he have the capability to fuse them together.
