He said the support to BYD is not for a company or an industry, but for a cause which can make people's lives become more beautiful.

Buffett, together with Microsoft founder Bill Gates, were shown around the company by Wang Chuanfu, Chairman and President of BYD Company Limited.

Buffet came to Shenzhen for the celebration of BYD's 1 millionth car coming off the production line Monday along with the first group of BYD E6s to travel 600,000 kilometers.

Buffett is also due to attend BYD events in Beijing and then in the central Chinese city of Changsha.

Buffett's visit came amid market rumors suggesting he might reduce his stake in the Chinese carmaker after his investment in BYD had risen six-fold.

Buffett's Berkshire Hathaway Group bought 10 percent of Hong Kong-listed BYD, which stands for Build Your Dreams, for 230 million U.S. dollars two years ago. That stake is now worth as much as 1.7 billion U.S. dollars.

BYD issued a statement Saturday saying reports of Buffett's possible stake reduction were not true.