Vertically or obliquely 1–1.5 cun
The 'Xuehai' (Sea of Blood) indicates its role. Xuehai SP-10 has a wide range of functions on Blood. With Tonifying Needling method, it nourishes Blood. With Reducing Needling method, it cools the Blood as well as invigorates the Blood by removing the Stagnation.
A wide range of gynecological and dermatological disorders occur either caused by Blood Stagnation or Blood Heat.
It also nourish the Blood, despite that it is less used this way than Sanyinjiao SP-6.