Question: Who fathered Emperor Ai of the Chinese dynasty with the oldest remaining wooden buildings?

Knowledge 1: Han dynasty
Timber was the chief building material during the Han dynasty; it was used to build palace halls, multi-story residential towers and halls and single-story houses. Because wood decays rapidly, the only remaining evidence of Han wooden architecture is a collection of scattered ceramic roof tiles. The oldest surviving wooden halls in China date to the Tang dynasty (618–907 AD). Architectural historian Robert L. Thorp points out the scarcity of Han-era archaeological remains, and claims that often unreliable Han-era literary and artistic sources are used by historians for clues about lost Han architecture. [SEP] Knowledge 2: Empress He (Tang dynasty)
Empress He (何皇后, personal name unknown) (d. January 22, 906), formally Empress Xuanmu (宣穆皇后) as honored by Later Tang, semi-formally known as Empress Jishan (積善皇后) (after the palace she resided in, Jishan Palace), was the wife of Emperor Zhaozong of Tang (Li Jie/Li Ye) near the end of the Chinese dynasty Tang Dynasty, and the mother of two of his sons, Li You/Li Yu and Emperor Ai of Tang (Li Zuo/Li Zhu). Her husband, she, and her sons would all die at the hands of the warlord Zhu Quanzhong, who would eventually take over the Tang throne and establish his own Later Liang.
Knowledge 1: Han dynasty
Timber was the chief building material during the Han dynasty; it was used to build palace halls, multi-story residential towers and halls and single-story houses. Because wood decays rapidly, the only remaining evidence of Han wooden architecture is a collection of scattered ceramic roof tiles. The oldest surviving wooden halls in China date to the Tang dynasty (618–907 AD). Architectural historian Robert L. Thorp points out the scarcity of Han-era archaeological remains, and claims that often unreliable Han-era literary and artistic sources are used by historians for clues about lost Han architecture. [SEP] Knowledge 2: Emperor Fei of Jin
Emperor Fei of Jin (; 342 – November 23, 386), personal name Sima Yi (司馬奕), courtesy name Yanling (延齡), was an emperor of the Eastern Jin Dynasty (265-420) in China. He was the younger brother (from the same mother) of Emperor Ai and later deposed by military leader Huan Wen. The title that he is normally referred to, "Emperor Fei", is not a posthumous name as is usually the case with imperial common titles, but rather signified that he was deposed (with "Fei" (廢) meaning "depose"). He is also commonly known by the title he was given after his removal, Duke of Haixi (海西公).
Knowledge 1: Han dynasty
Timber was the chief building material during the Han dynasty; it was used to build palace halls, multi-story residential towers and halls and single-story houses. Because wood decays rapidly, the only remaining evidence of Han wooden architecture is a collection of scattered ceramic roof tiles. The oldest surviving wooden halls in China date to the Tang dynasty (618–907 AD). Architectural historian Robert L. Thorp points out the scarcity of Han-era archaeological remains, and claims that often unreliable Han-era literary and artistic sources are used by historians for clues about lost Han architecture. [SEP] Knowledge 2: Sino-Tibetan relations during the Ming dynasty
In 1368, a Han Chinese revolt known as the Red Turban Rebellion toppled the Mongol Yuan dynasty in China. Zhu Yuanzhang then established the Ming dynasty, ruling as the Hongwu Emperor (r. 1368–1398). It is not clear how much the early Ming court understood the civil war going on in Tibet between rival religious sects, but the first emperor was anxious to avoid the same trouble that Tibet had caused for the Tang dynasty. Instead of recognizing the Phagmodru ruler, the Hongwu Emperor sided with the Karmapa of the nearer Kham region and southeastern Tibet, sending envoys out in the winter of 1372–1373 to ask the Yuan officeholders to renew their titles for the new Ming court.

Answer: Emperor Zhaozong of Tang