What is the custom of engagement in northern Jiangsu

Su Bei's custom, 24 years old to talk about marriage as a matter of course, both parents have the meaning of the formalization of this whole thing. But the marriage has to go Su Bei program, the first engagement. Asked the woman's parents engaged to what requirements, the woman's father opened the mouth is the first 30,000 yuan, and then want a diamond ring, necklace ...... after the engagement reception.