The text talks about Vietnamese coffee as a source of national pride, specifically the G7 coffee by Trung Nguyen legend. In southern cities like Saigon, coffee is a popular beverage for socializing. The G7 coffee uses Robusta beans with a high caffeine content, and it has a distinct taste, aroma, and bitterness. However, there can be issues with the fermentation process, resulting in a sour or even a rotten smell. In terms of making traditional Vietnamese coffee, the typical steps involve using a coffee filter, adding hot water, and letting it brew for a few minutes. The article also discusses the importance of deciding what to include on a coffee shop's menu, as it affects the other aspects of the business. Additionally, coffee beans are categorized based on their size, and improper storage and drying can affect the quality of the coffee. Finally, the recommended steps for making the perfect cup of coffee include using a coffee filter and adding hot water in two stages to allow the coffee to brew and develop its aroma.