Complex sentence: In 2000, Sifu Lok Sang Lee promoted two of his students, Susan Yee and Richard Ow, to the rank of Sifu so that they can continue to teach this traditional style.
Split into simpler sentences: In 2000, Sifu Lok Sang Lee promoted two of his students to the rank of Sifu, Susan Yee and Richard Ow. So that they can continue to teach this traditional style.