No problem. Up and down couplets depend on the tone of the last word. Legato is the upper part, flat voice is the lower part, Legato is three and four, flat voice is one and two. So there is nothing wrong with this couplet.

Spring Festival couplets, also known as "spring stickers", "door pairs" and "couplets", are one of the red festive elements "Year Red" posted during the New Year.