Treatment Theory of Portable 4D HIFU Machine: Adopting high intensity focused ultrasound, 4D HIFU can reach as deep as SMAS layer (3~4.5mm) and focus the heat energy produced by high-frequency vibration on one point. Then the interior heat is solidified from the exterior and contributes to the tightening as well as lifting effect of fascia, after which the subcutaneous structure is precisely improved from deep to shallow, shrinking aged collagen and stimulating its rebirth. It is unnecessary to worry about skin injury because the power is across the epidermis. Moreover, it has the functions of quick pulling, counters compacting and quick wrinkle smoothing. 4D HIFU Machine Applications: 1. Remove fine wrinkles around forehead, eyes, mouth, neck, etc 2. Improving skin complexion and elasticity, shaping contour 3. Lifting and tightening skin 4. Body slimming, fat reduction