However, the Tang Dynasty did not allow Kiyokawa to return home on the grounds that the travel would be dangerous due to Tang's turbulence by the Rebellion of An Lu-shan and Shih Ssu-ming.
しかし、当時は安史の乱により唐は騒乱状態であったため、行路の危険を理由に唐朝は清河の帰国を許さなかった。