用户需求是商业的起点，也是终点。
User needs are both the starting point and the end point of business.
Every novel is a journey into the unknown, both for the writer and the reader.
I don't believe in diversification. I prefer to concentrate on a few good ideas.
感觉不好也没关系。
永远不要停止学习，因为世界永远不会停止变化。