For example, is there something fishy about this tender? Why? ! Why can't two or three be effective?

It's hard to say whether there is something fishy, 50% is, and 50% is not. This kind of situation often happens in the bidding process, and it's nothing new. As long as the bid evaluation committee determines that the only furniture is competitive, the result will be valid, which is the right given to the bid evaluation committee by law.

Moreover, from this picture, the bidding documents of the abandoned units are fatal, and it is meaningless to complain. The only question is whether the winning company has the same problem, but you are not an insider and don't know, hehe, so basically there is no good way for you to overturn this result. Even overthrowing it won't do you any good.