非常感谢8老师，还有一个问题不懂

2. If my parents' pension together is just above 125% of poverty standard for household of 2, do I need to put myself in as a member of their household?-Yes. You still need to use your income to support your parents by providing I-824 even if your parents were millionaires.

-in the instruction of I944 for Part2, Item1, regarding household members, I don't belong to the category "children younger than 21 and unmarried"; I might belong to the category "Any individual who provides to you at least 50 percent of your financial support", however it only happens when my parents visit USA and do I need to provide evidence for it? How? 
再次万分感激8老师指点迷津！