Hua gu san, or Flower Bone Four 55.05, is a point in the Master Tung acupuncture system that is located on the sole of the foot.

Hua Gu San is also known as Flower Bone Three 55.04, a point on the sole of the foot in the Master Tung Acupuncture system.

Shang Liu (Upper Tumor) is a point on the sole of the foot on the centerline, anterior/distal to the calcaneal ridge. Palpate for this point