Although the difficulty in designing the exoskeleton's mechanical structure troubled Chen Xin, it wasn't actually hard to solve this problem.
The proper method would be to send this problem to a national research institution and let the specialists in the relevant fields perfect the design.
After all, it's not something overly complex or requiring high technical demands. In exoskeleton development, joint design is indeed a major issue, but it's not an unsolvable one.
The country already has mature wired exoskeleton designs and related R&D experience, so adapting them shouldn't be a big issue.
An even more effortless and worry-free approach would be to use a system upgrade. After all, since Chen Xin needed to solve the exoskeleton's energy issue, he would be using the system's upgrade function anyway, so optimizing the exoskeleton's mechanical structure would be just a matter of convenience.
