Why did Jia Baoyu call Qin's name (nickname: Ke Qing) in the fifth episode of A Dream of Red Mansions?

Qin Keqing in the dream is Baoyu's subconscious idol. Although this young girl is neither Daiyu nor Baochai, nor Qin Keqing, but the weight of the three is not equal, it belongs to Qin Keqing. Qin Keqing not only plays the role of "tour guide" in life, but also the girl's birth name is the same as hers. The thirteenth time, Baoyu heard this in his dream and vomited blood with anger. He ignored the grandmother's personal stop and ran to Ningfu, crying in front of the spirit. All these can prove how important Qin Keqing is in Jia Baoyu's heart. There are both conscious and dreamlike admiration for her extraordinary ability and subconscious admiration for Baoyu.