The quality of JD.com's self-operated old stores can be judged by the following data.

The first is sales. High sales of old stores usually means high customer satisfaction and reputation, while low sales may mean problems in quality, after-sales service, etc.

The second is transaction volume and number of reviews. High transaction volume and number of reviews represent high traffic and user stickiness, and high attraction and loyalty to users.

In addition, return and exchange rates and complaints are also important indicators for measuring the quality of old stores. Low return and exchange rates and complaints represent good performance in after-sales service and product quality.

Finally, the historical operating conditions and development plans of old stores are also factors worth considering. If the store has an increasingly perfect category layout and a constantly upgraded service experience, it can better maintain its market competitive advantage. In summary, the above data are important bases for judging the quality of JD.com's self-operated old stores.