Pay, scan, troubleshoot

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• A

  这个支付功能又更新了，界面怎么变了？

  Zhège zhīfù gōngnéng yòu gēngxīn le, jièmiàn zěnme biàn le?

  The payment feature updated again — why did the UI change?

• B

  他们说是为了提高安全性，多了一步验证。

  Tāmen shuō shì wèile tígāo ānquán xìng, duō le yí bù yànzhèng.

  They say it's for security — one more verification step.

+14 more lines in the full dialogue