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First, the standard of Putonghua should meet the "Putonghua Proficiency Test Grade Standard" issued by State Language Commission, Grade II, Grade B and above standards.In addition to solving the port problem of A, the serial number problem also needs to be paid attention to. The serial number corresponds to the sliding window. The fake TCP packet needs to be filled with the serial number. If the value of the serial number is not in the sliding window of B when it is sent to B before A, B will actively discard it. So we need to find the serial number that can fall into the sliding window between AB at that time. This can be solved violently, because the length of a sequence is 32 bits, and the value range is 0-4294967296. If the window size is like 65535 under Windows I caught in the above figure, I only need to divide, and I know that at most I only need to send 65537 (4294967296/65535=65537) packets to have a sequence number fall into the sliding window. The desired value can be calculated quickly by exhaustion on multiple control hosts.4. After opening the WeChat application, two WeChat icons will appear on the desktop of the mobile phone.自恋（长濑智也 饰）是一名刑警，有一个刚刚分手的前女友日暮里惠（中岛美嘉 饰）和一幢背负着贷款的为理惠买的豪宅。日暮里惠的嫉妒心和对自恋的盲目崇拜使得自恋变成了一个名符其实的自恋狂，现在自恋狂失恋了，而他的上司冴木优（荒川良良 饰）居然是一个新婚不久的幸福男人，更令自恋震惊的是，讶木的妻子不是别人，正是自己的前女友理惠。Warning: Do not register the license plate according to regulations.220. X.X.236