A man poured a bottle of water over Baidu CEO Robin Li on Wednesday at the opening of an annual conference for the Chinese search giant.
Li was speaking of applications for artificial intelligence (AI) in a speech when the young man approached him, spilled water over Li's head, and walked away.
"What's your problem?" Li shouted in English.
There are unexpected things on the road of AI development, Li calmly said to the applause of the audience.
He then went on with the lecture.