This sign refers to two allusions of Su Qin. One is that Su Qin, a famous strategist in the Warring States Period, once studied the art of coitus from Guiguzi. After learning from Guiguzi, Su Qin traveled for several years and achieved nothing, that is, "the teenager studied hard and was looked down upon by the whole family." Secondly, Su Qin's most brilliant time was to persuade the kings of the six countries to unite. He was a brilliant orator and wore the seals of the six countries.
Therefore, what you require is a signature. After signing, the last two sentences don't mean that Su Qin will go back to his hometown, but that he will go home penniless after becoming a powerful person, which is also to advise you to keep a low profile after doing what you ask.