I have no doubt you could be very competent in your area of practice but expatriate taxation is probably not your cup of tea.  I certainly wouldn't take offense if someone provides me this level of details on something I do not fully understand and advises that I should consider farming the work to a competent specialist.

US tax law cannot be applied in spirit when the letter of the law is clear.  That is especially so when it comes to ***statutory*** plans where the code clearly lays out the conditions for concessions and authorizes the IRS to issue regulations that govern its applications.

Furthermore, some of the line items your example refer to appear to be a combination of Chinese social security contributions and deductible benefits available only to expatriates under Chinese tax law.  That is why you should consider referring your client to someone who is familiar with both US and China IIT.

There are issues that are just too broad for all the details to be covered on a forum like this.  I have covered the high-level considerations but it is evident that there are a number of technical issues and practical matters relevant to foreign and US tax as well as compensation structure, which you do not seem to have experience in or fully comprehend.

It would be against the spirit of participation in the forum to deprive others of the opportunity to learn from one another by voting down a correct answer just because you do not like it.  Again, for that reason, you should consider retracting your no vote.