during ancient times, China's advanced construction techniques were demonstrated it was proved that ancient Chinese construction techniques were advaĐoạn văn21/40during ancient times, China's advanced construction techniques were demonstratedit was proved that ancient Chinese construction techniques were advancedit also demonstrates China's advanced construction techniques in ancient timesChina only demonstrated the advancement of its ancient techniques for constructionGiải thích-- Bạn chưa nhập giải thích --