Elder Tongzhu invited Qiu Changtian into a simply built cave residence and immediately began flattering and currying favor, clearly intending to establish a good relationship in advance with this "future leader of the Kunlun sect."
Qiu Changtian was now adept at handling such social situations, and after exchanging a few words with Elder Tongzhu, the atmosphere quickly became lively.
"By the way," Elder Tongzhu said again, "a young member of my family has recently become your disciple, and I hope you will guide him."
"Oh," Qiu Changtian asked in surprise, "and that would be..."
"Luo Chuan," Elder Tongzhu replied, "that child, by lineage, is directly descended from me."
The so-called "direct descendants" are akin to a son's son's son... extending down through the paternal line, a relationship tighter than "collateral descendants" (direct descendants of a brother).