Which adjective is suitable here?

0I want to say something like food, house in China is charper than in HK ;therefore, if people working in China have similar salaries as in HK, their living standard will much more better than that in HK because the money is more (what adjective can i use here?useful?effecient?).02br
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00Please help me write the appropriate adjective to modify the usage of the money in this situation as i can't think of it. Thank you 0-