Deal with life experience

A fire thief certainly appears when big money moves. They are all good garbled, pretending a good friend with generous in a friendly manner. As we are going to move our laboratory in very near future, such kind of person appeared without exception flattering my young son who is quite vulnerable to money-minded traders. Remember here, too kind is suspicious!
As we have no planning to introduce any new machinery nor materials this time in addition to new coworkers, there is no hope to get out any money from us.
Not a few merchants try to come across to us with desperate efforts these days.
Again I just remembered a famous proverb, "As a wolf resembles a dog, so a flatterer does a true friend.".
True friendship is not in interests.