This one-way friend detection technology is to detect whether the other party is still your friend by sending some codes, but if the other party is your friend, the other party can't receive the information, otherwise it can't be called a patent, because if it is a group message, will someone apply for a patent if they reply? I can do it myself, so this new patented technology is mainly aimed at people who can't know if they have friends after adding friends, and whether they have deleted their needs after a long time.
You have seen all kinds of methods to detect friends on the Internet before, but this is actually a third-party software. Some of them are really useful, but some of them are over 80%, basically defrauding your personal information. Later, more than one official media reported this incident, but people gradually became alert and stopped believing in these things, which proved that there was such a demand in the market, that is, most people felt that they needed it when the number of their friends list reached a certain level.
Because the number of friends you can add to your list is limited, and normal people can't reach that limit, only some marketers in WeChat business will add many friends, because normal people's circle of friends will not produce as many as 5,000 friends, so it meets the needs of most people.