We've done price elasticity studies, and the answer is always that we should raise prices. We don't do that, because we believe -- and we have to take this as an article of faith -- that by keeping our prices very, very low, we earn trust with customers over time, and that that actually does maximize free cash flow over the long term.

Sustainability is not just a goal, but a necessity for future business.

指感情所专注的，正是我们这些人。

In the short run, the market is a voting machine but in the long run, it is a weighing machine.