What are the verses about concentric knots that appear in "The Biography of Zhen Zhen"?

Double Qi belts in the waist, the dream is a Tongxinknot that Shiro gave to Zhen Huan

Source: "Thinking" - Xiao Yan

Who said that we would be separated for a long time, and I would like to say goodbye to you. The fragrance is still there on my clothes, and the book in my hand is still there.

Double belts at the waist, the dream is a concentric knot. I am often afraid of revealing my thoughts, and Yaohua cannot bear to break.