If we receive the last message in a group, then we can obtain the group identifier and use its sequence number to determine the size of the group.

如果接收到了组中的最后一条消息，则可以获取组标识符，并使用其序列号来确定组的大小。

youdao

If we receive the last message in a group, then we can obtain the group identifier and use its sequence number to determine the size of the group.

如果接收到了组中的最后一条消息，则可以获取组标识符，并使用其序列号来确定组的大小。

youdao