Generally speaking, if the two parties involved in the wedding are less than a month apart, they will not attend each other's wedding. If local customs don't have this habit, you can of course participate. However, if there is such a custom or the other family is concerned about celebrating, don't go.
Extended data
In our country's laws, there are not many procedures for citizens to get married. In fact, only the civil affairs department of the local government needs to register for marriage to take effect. However, the influence of the traditional marriage system still exists, and the remnants of six major ceremonies, such as engagement, dowry exchange, welcoming relatives and friends, and holding a formal wedding, are still widespread.
The so-called wedding ceremony popular in China is mainly based on a set of operating procedures introduced by Taiwan Province Wedding Company in 1990s. This template is compatible with Chinese and Western wedding ceremonies, conforms to the tastes of contemporary young people in China, and develops the lively side of traditional weddings to the extreme.
The leader of the wedding is the wedding company, which turns the very simple wedding ceremony in western-style weddings into one of the most important parts that are expensive, complicated and need long-term preparation.
Baidu Encyclopedia-Wedding (one of life ceremonies)