Zi Collection, Page Position: Upper, Radical: Knife (dāo), Page 104, Entry 03 "To pierce and cut" - Jiyun (Jiyun), pronounced zhi (rising tone). "To pierce and connect" - Yangzi's Taixuanjing (Taixuanjing). Commentary: "To pierce and connect" means to unite the two. Note: Two fires. When in the element of fire, two fires meet and combine, piercing and connecting closely as one, hence "no gap." "To unite the two" speaks of one yin and two yang, mutually interacting.