The upper of the upper is pulled down too far, causing the upper to be tight. <br>Corrective plan: <br>Provide education and training for the employees of the upper, and clearly understand the standard <br>RQC of the upper. Conduct spot checks on the quality of the upper every hour. <br>Randomly check the finished shoes every day to try on the <br>consistency of the quality of the upper. Standardization of timeliness <br>of fitting testing process and quality
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