Chinese tech czar Jack Ma on Wednesday said there are no experts for tomorrow and all they know about is yesterday.

Addressing the World Economic Forum Annual Meeting here, the Alibaba executive chairman also told business leaders never to worry about competition and pressure.

“If you worry about pressure, don’t be a businessman. Today, the great thing is everybody worries about everything,” he quipped.

Replying to whether he encountered fear or doubts over the course of building Alibaba over the last 20 years, he said “There’s no expert of tomorrow. There’s only expert of yesterday.”