"No doubt the North American approach ..." probably better than "mode" here? I see you like "mode" so I won't comment on this again in relation to the body of the text. Perhaps "system" might work here; or even "model". I'm not sure about "mode"; it's not an error, but I don't think I like it. "and to be affected relatively more heavily by family background ..." "than the Chinese mode ..." " both of which " - I'd prefer "and both of these ..." This avoids a possible misunderstanding of the referent of your "which". "and recommendation letters" or "and letters of recommendation". "Kid" is informal, and to match the general tone of this piece "applicant" might work better. "When the social mobility compromises, the wealth differentiation of the country will be even more widened." -->> When social mobility is compromised, income and wealth inequality will be further widened. " Mode, system, approach, model OK, "mode" can be a word for a way of doing things. Merriam Webster [5] gives us ": a possible, customary, or preferred way of doing something " But I don't find this expression comfortable in this use. I would definitely advise you consider "system", "method", "approach" or even "model" as an alternative https://en.wikipedia.org/wiki/University_and_college_admission gives us "Systems vary widely from country to country, and sometimes from institution to institution" on this topic. And https://link.springer.com/chapter/10.1007/978-3-319-77407-7_12 gives us "A Typology of Admission Systems Across Europe and Their Impact on the Equity of Access, Progression and Completion in Higher Education"