What patent did Xiaomi use from Huawei?

Xiaomi used Huawei's exclusive patent. According to the relevant inquiry information, Xiaomi's products are also seamless. At the same time, assuming that Seamless is indeed Huawei's exclusive patent, Huawei formally sued Xiaomi because these companies used Huawei's patents without permission. To put it bluntly, it is patent infringement. As soon as this news came out, it immediately attracted attention.