First he was a teacher. Then he was China's top tech titan. Now, meet Jack Ma 3.0 — a high-tech farmer.

• Three years after he criticized Chinese regulators, Alibaba cofounder Jack Ma is still lying low.
• Once the poster child of Chinese tech, his words angered Beijing and precipitated a crackdown on his business empire.
• Ma has since been busy touring the world studying high-tech agriculture and morphing into the next phase of his life.

Alibaba cofounder Jack Ma was once the invincible poster boy of Chinese tech.