你的说法“我说中国政府并不会像香港政府或新加坡政府用在海外居住超过183天就豁免海外收入税的做法”
错。新加坡政府本来就不对海外收入课税（绝大部分）
如果你是新加坡税务居民，就算你一年在新加坡呆满365天，也不需要对大部分的海外收入纳税，根本不存在这个所谓海外居住183天才能豁免的条件
IRAS原文：
Overseas Income Received in Singapore
Generally, overseas income received in Singapore by an individual is not taxable and need not be declared in his/her Income Tax Return. This includes overseas income paid into a Singapore bank account.
兄弟
google了点进去看全文呀 别断章取义
Overseas Employment
If you are contracted to be based overseas to render your full employment services wholly outside Singapore, you are not liable to tax in Singapore as your employment income is sourced outside Singapore.
It does not matter where and how you are being paid. Your employer will not need to prepare the Form IR8A for you to file your tax in Singapore.
Rendering Services in Singapore as Part of Your Overseas Employment
If you render your employment services in Singapore as part of your overseas employment, your income attributable to services rendered in Singapore is subject to tax in Singapore as follows:
Employment exercised in Singapore for not more than 60 days in a calendar year
Your employment income will be exempt from tax.
Employment exercised in Singapore for 61 to 182 days in a calendar year
You will be regarded as a non-resident. Your employment income will be taxed at either a flat rate of 15% (no personal reliefs would be granted) or progressive resident rates, whichever gives rise to a higher tax.
Your employer will have to seek Tax Clearance when you cease employment in Singapore.
Employment exercised in Singapore for 183 days or more in a calendar year
You will be regarded as a tax resident. Your employment income, after deduction of tax reliefs, will be taxed at progressive resident rates.
Your employer will have to seek Tax Clearance when you cease employment in Singapore.
Overseas Employment
If you are contracted to be based overseas to render your full employment services wholly outside Singapore, you are not liable to tax in Singapore as your employment income is sourced outside Singapore.
It does not matter where and how you are being paid. Your employer will not need to prepare the Form IR8A for you to file your tax in Singapore.
Rendering Services in Singapore as Part of Your Overseas Employment
If you render your employment services in Singapore as part of your overseas employment, your income attributable to services rendered in Singapore is subject to tax in Singapore as follows:
Employment exercised in Singapore for not more than 60 days in a calendar year
Your employment income will be exempt from tax.
Employment exercised in Singapore for 61 to 182 days in a calendar year
You will be regarded as a non-resident. Your employment income will be taxed at either a flat rate of 15% (no personal reliefs would be granted) or progressive resident rates, whichever gives rise to a higher tax.
Your employer will have to seek Tax Clearance when you cease employment in Singapore.
Employment exercised in Singapore for 183 days or more in a calendar year
You will be regarded as a tax resident. Your employment income, after deduction of tax reliefs, will be taxed at progressive resident rates.
Your employer will have to seek Tax Clearance when you cease employment in Singapore.
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