After the marriage relationship is clear, the man chooses an auspicious day and invites the matchmaker to send the Niangeng to the woman's house to determine the wedding date. This is "inviting Japan", which is called "sending Japan" in the East.

In Rudong, in addition to the date of issue, there is also the custom of changing posts, that is, both men and women change posts and get old.

For the man's invitation, the woman often pushes from pillar to post, repeatedly refuses, and fabricates various reasons to' prevaricate'. The woman "reluctantly" agreed until the man invited her three times and invited her four times, otherwise she would be laughed at. Shortly after the invitation, the man will ask the fortune teller to infer the auspicious day of marriage. This date is usually the year after the engagement. Rudong people's habit is not to have two happy events a year. Even if they are engaged in the twelfth lunar month, it doesn't matter if they get married in the first month of the following year, but not in the same year.