Retracting the chin masseter muscle is effective, but it is not friendly to the apple muscle. Pull the apple muscle down (probably because my apple muscle is too big), so those who need to retract the chin and neck can enter, and those who need to lift the apple muscle should be careful not to buckle too much Do not buckle it, especially behind the ear) or pull down the apple muscle.
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收下巴咬肌有效，但是对苹果肌不友好，硬把苹果肌往下拉（大概是我苹果肌太大）所以有需要收下巴脖子的可以入，需要提拉苹果肌的要注意了不要扣太紧尤其是耳后就不要扣了）不然下拉苹果肌。