In Chapter 6 of A Dream of Red Mansions, Grandma Liu showed us the following aspects of the Jia family’s situation:

1. The luxurious life of the Jia family. Grandma Liu saw various luxurious furnishings, rich delicacies and exquisite etiquette in Jia's mansion, which all showed the luxurious life of Jia's mansion.

2. The internal relations of the Jia family. Grandma Liu came into contact with various characters in Jia's house, including masters and servants. Through her observations, the author demonstrates the strict hierarchy and power relations within the Jia family.

3. The pomp of Jia’s house. Grandma Liu was deeply impressed by the ostentation of Jia's family, such as the silence at the dinner table and the well-trained little girls, which all showed the rules and ostentation of Jia's family.

4. The architectural layout of Jia Mansion. After Grandma Liu entered the Grand View Garden, she gave a detailed description of the layout and scenery of the garden, which allows us to have a general understanding of the architectural layout and garden landscape of the Jia Mansion.

5. The social status of the Jia family. When Grandma Liu told Jia's mother about her life experience, she mentioned that the Jia family was a family where "a hundred-footed insect is dead but not dead", which reflected the status of the Jia family in the society at that time.

In general, Grandma Liu’s presentation of the Jia Mansion in Chapter 6 provides an important perspective for us to understand the lifestyle, social status, internal relationships and architectural layout of the Jia Mansion. At the same time, it also paved the way for subsequent plots such as the decline of the Jia family and the rescue of Qiaojie.