当且仅当所有投资者都持有均值-方差有效的投资组合时,市场组合才是有效的。
I don't do 'signature' architecture. Each project is a new challenge.
The role of the artist is to make the invisible visible.
可持续性不是一种选择,而是煤炭行业的必需品。
In times of crisis, true leadership is measured by actions, not words.
I've always been a very private person, but I've learned that it's okay to let people in.
The best way to predict the future is to create it.