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"Even patient's own children might not do it, but Zhang did it. This is so admirable. We all should learn from him," said an internet user.

"Every luxury brand today is making difficult decisions between staying exclusive and becoming accessible, which essentially means sticking to its tradition and driving up business," said Bedi Ye, founder and editor-in-chief of luxury watcher website Fashiontrenddigest.

"Different from a traditional enterprise relying more on capital to expand, tech companies instead rely heavily on their founders," Hong said.

"Earlier pottery was used to preserve the tea, but then porcelain became popular," says Zhou.

"Every year we're developing new technology - like deep learning, which has improved the performance of pattern recognition.