回複：請教單身老貓或會計師：綠卡身份，在中國十個月，收入

congratuations! you've passed the substantial presence test because you have been physically present in the United States on at least:

1. 31 days during the current year, and
2. 183 days during the 3-year period that includes the current year and the 2 years immediately before that, counting:
a. All the days you were present in the current year, and
b. 1/3 of the days you were present in the first year before the current year, and
c. 1/6 of the days you were present in the second year before the current year.

Upon passing the test, you will be treated as a U.S. citizen for the tax purpose, and you are required to report ALL (remember that $10 bill u picked up in the streets of HK? yea that too) INCOME to IRS.