21世纪商业评论

When I walked inside PKU, I feel comfortable.
Becasue along the path, there are high-green trees guarding me on both sides.
It reminds me on my class of architechture design, the professor emphasize the height of a hall affect the emotional feeling of people working in the building.

Comfortable coms from "Open", "Stable", "Feeling of safety"
Rule number one, make user feel "unlimit".
Second, be aware of the "privacy".
Finally, communicate with users, tell them you care them so much.