The murals of Dunhuang, today, regarding its artistic category, the contention of the group of authors has long been submerged in its great achievements as a custom record. It has a long-lasting emotional resonance, it evokes a broad cultural identity, it guides people A deep understanding of the spiritual beliefs and secular life of the ancestors, spanning the long river of history vigorously, so vividly and powerfully, acts on the hearts of the viewers in a way of memory. What does this text emphasize? ['Great achievements of Dunhuang frescoes.', 'Cultural spirit of Dunhuang frescoes.', "People's recognition of the value of Dunhuang frescoes.", "People's emotional resonance for Dunhuang frescoes."]