无名指上有条血管通向心脏
[wú míng zhĭ shàng yŏu tiáo xuè guăn tōng xiàng xīn zàng]
Based on an old legend that the ring finger (unnamed finger) has a vein directly linked to the heart, the phrase means there is something very close to or significant in one’s heart, especially referring to romantic engagements where rings play an iconic role.