How did Granny Liu know that Xue Baochai was a ghost in A Dream of Red Mansions?

Grandma Liu knows that Xue Baochai is a ghost, because grandma Liu feels gloomy and transparent when she arrives in Luogang, where flowers bloom and flowers fall and two beaches of grass wither, which is more helpful to autumn. They felt cold and gloomy before they entered the house. There are withered autumn grass and withered horseshoe leaves on the beach. Compared with the elegance of Daiyu's boudoir, the atmosphere of exploring spring and the elegance of cherishing spring, Baochai's boudoir can only use two words, something congenial. So granny Liu judged that Xue Baochai was a ghost.

Extended data:

Family background:

Xue Baochai was born in one of the four great families of Jia, Shi, Wang and Xue in Jinling. This Xue family is the following eight sects. On the "official protection symbol", Xue Jia has the saying that "pearls are like earth, and gold is like iron", describing that he has millions of property and is extremely rich.

Xue Baochai went to Beijing with her mother and brother for the following reasons:

First, due to the recent worship of poetry and ceremony, the recruitment of talents can not be degraded to the world. In addition to hiring concubines, the daughters of famous officials are all their own names, and they are chosen as the guards of the princess, which is full of praise from talents;

The second is to visit relatives and friends;

Third, since the death of Uncle Xue, the trading bureaus, managers and clerks in various provinces took the opportunity to kidnap Xue Pan because he was young and inexperienced. Several transactions in Kyoto are gradually consumed, and Xue Pan needs to personally enter the Ministry, cancel the old accounts, and then calculate the new ones.