About Taobao's transaction record and transaction success.

When the buyer has photographed and paid, it will be recorded in the transaction record, that is, the transaction has been completed. If the transaction is successful, the buyer will confirm the receipt in Taobao after receiving the goods, which is regarded as a successful transaction; After the transaction is successful and the buyer completes the evaluation, the seller also evaluates the transaction (generally called mutual evaluation). After the mutual evaluation is successful, comments will appear in the evaluation details. If the transaction is successful and the buyer does not make any evaluation, there is no evaluation details. This is the reason why the transaction was successful.

In the case of your screenshot, the reason analysis:

The buying and selling situation may be a short-term outbreak, that is, a large number of transactions occur within three to five days. Due to the large transaction volume, it may lead to slow delivery and logistics takes time, so many buyers took photos of payment, but did not receive the baby. So the receipt has not been confirmed, let alone evaluated.

I hope it helps you, thank you!