| Native Name: | 支艮 Chi Cấn |
| Conventional Long Name: | Cấn line Third dynasty of Hùng kings |
| Common Name: | Third dynasty of Hùng kings |
| Era: | Hồng Bàng period |
| Year Start: | 2524 BC |
| Year End: | 2253 BC |
| Life Span: | 2524 – 2253 BC |
| Event Start: | End of the Khảm line |
| Event End: | Beginning of the Chấn line |
| P1: | Khảm line |
| S1: | Chấn line |
| Capital: | Phong Châu |
| Government Type: | Monarchy |
| Title Leader: | Hùng king |
| Leader1: | Hùng Lân vương(雄麟王), Lân Lang |
| Year Leader1: | 2524 BC– |
The Cấn line (Vietnamese: chi Cấn; chữ Hán: 支艮; chi can also be translated to as branch) was the third dynasty of Hùng kings of the Hồng Bàng period of Văn Lang (now Viet Nam). Starting 2524 BC, the line refers to the rule of Lân Lang and his successors, when the seat of government was moved to what is today Phú Thọ.[1]
Lân Lang was born approximately 2570 BC, and took the regnal name of Hùng Quốc Vương (雄國王) upon becoming Hùng king.[2] The series of all Hùng kings following Hùng Lân took that same regnal name of Hùng Quốc Vương to rule over Văn Lang until approximately 2253 BC.
Lân Lang later changed the national appellation from Xích Quỷ to Văn Lang. Since this time the different ethnic minorities of Vietnam were formed.[3] The administrative rule of the Lạc tướng, Bố chính, and Lạc hầu was promulgated.[4]
Around 2500 BC, the Hùng king expanded rice cultivation.[5]