[Xi Yin, Harvard's Youngest Chinese Professor, Announces Departure from OpenAI] Xi Yin, the youngest Chinese full professor in Harvard's history and a professor of physics at Harvard, posted on X that the day of the post was his last day at OpenAI. He announced his departure and will move to a new direction, without revealing his specific destination. In the post, Yin thanked Alex Lupsasca, Boris Alexeev, and Dan Roberts. In late May of this year, news broke that Yin was leaving academia to join OpenAI. Yin researches string theory and quantum gravity. He entered the University of Science and Technology of China's gifted youth program in 1996 and became a full professor in Harvard's Department of Physics in 2015 at the age of 31. He received the 2017 Breakthrough Prize in Physics' New Horizons Award.