谢谢！那应该是按第二种来算。但是不太清楚为什么很多课件上都有第一种算法。。。

第一种方法不需要估算经营资产变化，EBIT在很多例题或者报告中会给出，计算上比较简单吧，纯属个人猜测

use the second method. The first method provides an estimation of operating cash flow. It is a simple but less precise method.
Actually the second method is not accurate either. The correct way to calculate the operating cash flow should be:
Net income + deprecition - Gains + losses +adjustments of changes in working capital.
working capital = current operating assets/liabilities.
Any increase in current operating assets, such as accounts receivable, inventory, prepaid assets, etc., should be subtracted.
Any increase in current operating liabilities, such as accrued expenses, should be added into the net income.

谢谢大神！完全明白了！

Thank you for your kind reply which is very clear. Would you mind to explain further why the increase in current liabilities will increase the operating cash flow, since it doesn't make sense to me logically. Thank you in advance.

Thank you for your kind reply which is very clear. Would you mind to explain further why the increase in current liabilities will increase the operating cash flow, since it doesn't make sense to me logically. Thank you in advance.