Is it okay to post the slogan "Spit Serum Warehouse, Sale in Tears" at the door of my clothing wholesale store? No other merchants around have done this.

It can be used. Search on the Internet. Many stores are using such slogans, and some are even more ruthless than this advertisement.

The purpose of using such advertising slogans is to attract customers' attention. If ordinary advertising slogans are used, the effect of stimulating eyeballs may not be achieved, and the purpose of sales promotion will not be achieved.

If your mother insists on not using such advertising slogans, you can make a comparison, that is, she will not use such advertising slogans at first, and then use exaggerated advertising slogans after a few days, and then you will have the answer.