According to your question, meeting the partner's relatives before getting married means that you and the partner are already very close. Nevertheless, even if you get married tomorrow and become a family, it is more appropriate to observe the title of ordinary relationship today.
Marriage is sacred, and stepping into the palace of marriage is a very ceremonial event for Chinese. This sense of ritual includes both the external form and the internal psychology, both of which are very important for a couple and both family members.
Therefore, it is recommended that you clearly divide and implement etiquette according to the process. To what stage, what to call. It is the best policy to be polite and courteous, and to have a face.
Call the target's parents, just call your uncle and aunt before you get the certificate, or according to the customs of your hometown, call the parents of your classmates how you want to call the target's parents. Other relatives, it stands to reason that the parents of the subject should change their words at the same time, but they do not show respect for the elders, in order to avoid confusion, the parents of the subject ask you how to call those three aunts and six women, and you obey.
In many places in China, the wedding scene is given on the spot by the parents of the object after the tea ceremony"Mouth change fee"The purpose of this link is to change the name on the spot, by"Uncle and aunt"Instead"Mom and Dad"- For the sake of traditional etiquette, it is recommended that you should not change your title in advance.