Yue Liu, or Lenny, PTC Physics Tutor, is a undergraduate junior majoring in Physics & Math. Lenny was born in Beijing, China, and completed his education til high school there. Lenny was inspired by his father and his middle school physics teacher when he was young, which fostered his interest and love in physics. Lenny has thorough and unique thoughts in analyzing physical problems in classes and life, and he is excited about sharing his thoughts to help more students in physics.