最好的铁矿石，未经熔练，也无法成钢

most of those who went overseas with scholarships were those who were a little more gifted, and more hard-working,

for most, the efforts paid off in the sense that, at least, they have made a decent living,

if the discussion is all about comparing the size of a house, the peace, comfort, and stability of life, there is no point for these people to go back to China.

since for them, payout/efforts will be less than desirable,

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by the same token, for those who have not secured a decent life, the payout/effort ratio will be much favorable to go back China,

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still, there are a subset of the "secured" group, who are not satisfied,

for those, China offers a better platform, their relative strength can be greatly enhanced. There are chances for them to be more productive, more creative, and having more impacts.

more chances,

for them, bottom is not a concern since it's taken care already... they were paying their due in the past years,

so, for such, who are unsatisfied, and able, and ready to take a fight,

in seeking the upside in terms of achievement, freedom, redemption,

go East,