Southern Vietnam is a place on Earth where a lot of people live. It's located in the southern part of a country called Vietnam. The weather in southern Vietnam is hot and humid, which means it can make you sweaty.
There are many cities in southern Vietnam, including Ho Chi Minh City (which used to be called Saigon), Can Tho, and Vung Tau. People in these cities speak a language called Vietnamese. They also eat different kinds of foods like pho (noodle soup) and banh mi (a type of sandwich).
In southern Vietnam, there are also lots of things to see and do, like visit beaches, explore the Mekong Delta, see historic buildings, and shop at markets. People in southern Vietnam also celebrate many holidays, like Lunar New Year, which is a big festival that lasts several days.
Overall, southern Vietnam is a really interesting and vibrant place full of people, food, culture, and things to do.