Lu9 - 太渊穴 Source point. Starter point for sleep, located in the radial groove, on the wrist crease, in other words before the radial styloid. This point boosts the Lungs meridian during its season-autumn- but disperses it in summer. In all seasons, it can treat the following disorders: Has a beneficial influence on the arteries. Gives you extra energy in the case of low blood pressure (+). Gives you extra energy in the case of sadness (+), when combined with St36 (+), Sp6 (+) and Ht3(-).