You said Li Zhen was in St. Schwab. Point out some usual precautions.

Hold the armpit with one hand, and hold one breast with the other hand and gently push it up. Hold the breast with one hand, and gently pat the breast with the other hand from bottom to top. No pain. Hold it with one hand from under the breast, and massage it with both hands in circles around the breast from the inside out. Gently rub the areola toward the armpit, and gently squeeze with the other hand. (In the process of these steps, you must cooperate with Princess Kexin's daubing, so I won't talk about it below.)

Put one hand on the sternum, massage spirally in the armpit direction, hold the nipple with the index finger and middle finger against the chest, and gently pull it out, being careful not to pull it. Press your forefinger and middle finger on your chest and pick up your nipple. Fingers are slightly folded and tightened, rotating in an arc.