How to stick couplets around is correct.

According to the tone, the last word in the upper part is three or four tones, and the last word in the lower part is one or two tones.

From the content: the upper and lower parts usually have a causal, progressive or sequential relationship. Read the couplets carefully before posting, and understand the contents of the couplets. From the perspective of plain lines, we can also judge the upper and lower couplets from the plain lines of the upper and lower sentences of Spring Festival couplets. Generally speaking, suffixes with three or four tones are the upper part, and suffixes with one or two tones are the lower part. Of course, not all Spring Festival couplets are like this, so we should treat them differently.

After the upper and lower parts are clearly separated, use the prepared paste or adhesive tape, double-sided adhesive tape, etc. Paste the upper part first, the upper part should be pasted on the right hand side (the left side of the door), and the lower part should be pasted on the left hand side (the right side of the door).