Before engagement, both parties usually go to check each other's background (in Jiang Yan's words, it is very important to have body odor).
When engaged, the man usually gives the woman some gifts (usually, the woman says, according to the economic strength of both parties, take 8, such as 10800, 18888,) and the man buys her four gold.
When getting married, the man prepares the house and household appliances, and the woman is responsible for the decoration and dowry (usually bedding). Of course, this is an ordinary family with good economic conditions. The man is generally responsible for the house and decoration, and the woman buys home appliances and other things. Of course, if your father-in-law has money, he will also send a car, so you can make money, hehe.
As for not getting married at the age of 30, there is pressure from parents, but friends should not be too impatient. Everything is fate. Fall in love and get engaged at the age of 28. It took four months from falling in love to getting married. Hehe, I have been married for five years now, and my family is happy.