Mr. Li, 44 years old, has emerged as a leading candidate to run a chunk of Berkshire’s $100 billion portfolio, stemming from a close friendship with Charlie Munger, Berkshire’s 86-year-old vice chairman. In an interview, Mr. Munger revealed that Mr. Li was likely to become one of the top Berkshire investment officials. “In my mind, it’s a foregone conclusion,” Mr. Munger said.

Twenty-one years ago, Li Lu was a student leader of the Tiananmen Square protests. Now a hedge-fund manager, he is in line to become a successor to Warren Buffett at Berkshire Hathaway Inc.

Mr. Li was born in 1966, the year Mao Zedong’s Cultural Revolution began. When he was nine months old, he says, his father, an engineer, was sent to a coal mine to be “re-educated.” His mother was sent to a labor camp. Mr. Li’s parents paid various families to take him in. He was shuttled from family to family for several years until moving in with an illiterate coal miner, with whom he developed a close bond, in his hometown of Tangshan. Living apart from his family as a child taught him survival skills, Mr. Li says.
He was reunited with his family, including two brothers, by age 10, when a massive earthquake hit his hometown, killing an estimated 242,000 people in the area, including the coal miner and his family. His nuclear family was spared, he says, but “most of the people I knew were killed.”

From left to right: David Sokol of MidAmerican, Warren Buffett, Wang Chuan-Fu of BYD and Mr. Li.

At the time, he says he had no direction and was fighting in the streets. Mr. Li says his grandmother, who was among the first women in her city to attend college, inspired him to begin reading and studying. He later attended Nanjing University, majoring in physics.

Mr. Li’s investing strategy represents a significant shift for Mr. Buffett: Mr. Li invests chiefly in high-technology companies in Asia. Mr. Buffett typically has ignored investments in industries he says he doesn’t understand.

Li Lu (far right) with Chinese student leaders at Tiananmen Square in June 1989.
Mr. Buffett says Berkshire’s top investing job could be filled by two or more managers who would be on equal footing and divide up responsibility for managing Berkshire’s $100 billion portfolio. David Sokol, chairman of Berkshire unit MidAmerican Energy Holdings, is considered top contender for CEO. Mr. Sokol, 53, joined MidAmerican in 1991 and is known for his tireless work ethic.
In an interview, Mr. Buffett declines to comment directly on succession plans. But he doesn’t rule out bringing in an investment manager such as Mr. Li while still at Berkshire’s helm.