"Perhaps," speculates Mr. Liu Yi-ch'ang of Academia Sinica's Archaeology Section, "the people of the Ch'angpin culture, cut off from the outside world and living in comparative ease, imperceptibly lost their desire to progress, eventually resulting in a kind of cultural stagnation. '"
中央研究院史語所考古組研究員劉益昌表示，這個疑問在考古上有一種推論﹘﹘或許當時在長濱地區生活的人類，生存空間受到高山環繞的限制，不容易和外界溝通，溫飽無虞，也頗安於現狀，無形中減緩了他們的進步，因而出現了一萬年的所謂「文化遲滯」現象。