Should we do business with our close friends? For example, establishing a company.

Accoding to me, i agree with Mr Hoa Dang Ngoc' opinion.
But in business, there are too many matter that we can not make it clealy.
if there is conflict between close freind, we allway keep it in mind each other and can not talk anything. Affter long time, It resufled in crack in relationship.

Sometimes it's good, sometimes it's not! It hard to say certaintly about this!

If u and ur friends r professional. We will run business "professional". I mean that professional is clearly, "paper", commitable..

Nên cân nhắc kỹ. Vì đôi khi làm kinh doanh rất dễ mất bạn. Mọi thứ nên rõ ràng ngay từ đầu. Cách thức hợp tác, quản lý, xử lý công việc...

Definitely should not, otherwise you'll lose both friend and money.