"Even two months before the IPO, people didn't think we would make money," Jack Ma said at the World Internet Conference in Wuzhen City.
"Now the problem is people think we are too good -- we can do anything. This is the most dangerous moment," 50-year-old Ma, also China's richest man, said.
Today's warning reminds of previous remarks from the tycoon about the challenges facing the company, from employees turning complacent and stopping innovation to failing to embrace opportunities in the mobile age.
Referring to the innovations in the pipeline, he said: "Traditionally, all we think about is how to sell products to others and how to get money out of the pockets of consumers."
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"The internationalisation of Alibaba's business requires us to ponder the issue of how to help others sell their products to us," he said adding, "China's rapidly rising middle class is posting a huge demand for foreign products."
In February, Alibaba launched "Tmall International" dealing mainly in commodities produced or sold in overseas markets and it raised USD 25 billion in September, the world's biggest initial public offering.
Ma believes that in the global village, old trade modes will be transformed and within the WTO framework the rules of game are set by the governments.
The market is frequently at the mercy of international relations, he was quoted by the state-run Xinhua news agency as saying.
The Internet has made it possible for a business world built by the entrepreneurs themselves to evolve on the basis of the market economy and unencumbered by political squabbling, he said.