The fragrance of tea lingers around for generations. (Note: "The fragrance of tea lingers around the beams" refers to Lao She's masterpiece - the drama "Teahouse". "Four Generations" is a pun. On the one hand, it means another masterpiece of Lao She, "Four Generations Under One Roof", on the other hand. The second meaning is that his literary achievements influenced the Chinese people of the era.
) Hope it helps you!