Sun Yafang may leave Huawei for the following reasons:
1. Family reasons: During his tenure as chairman of Huawei, Sun Yafang may have been busy with business and neglected to take care of his family, which eventually led to family breakdown. When her daughter 12 years old, her husband divorced her and admitted that she was cheating, which may force her to choose to leave Huawei to deal with personal problems.
2. Career development: Sun Yafang's performance at Huawei is widely praised and respected, but she may have different views on her career development. She may think that her strength needs to be improved and she needs to find new development opportunities.
3. Inconsistent values: Huawei was accused of unethical behavior in business activities, which may have triggered a conflict of values in Sun Yafang. She may think it violates her values and decide to leave.
Generally speaking, all these reasons may have influenced Sun Yafang's resignation, but only she can give the most accurate answer to the specific reasons.