Porcelain was originally a vulgar object, a daily necessity, originally born from pottery. After thousands of years, it finally got rid of its original rough appearance, entered the room, and became a tasteful work of art. It is still used in daily life, and has not lost its secularity because it has become a valuable art work. Secular is the thick and huge artistic foundation of porcelain. On this basis, it has gradually climbed higher and higher, and the art is endless. The beauty is endless. It can be seen that Daya is contained in the vulgar, and there is no vulgarity, but the vulgar is actually one. The paragraph is intended to emphasize:. ['Daily needs are the driving force for the development of porcelain art.', 'The development of porcelain art has gone through a long process from vulgar to elegant.', 'The interdependence and dialectical relationship between the customs and elegance of porcelain art.', 'Crude household items have evolved into fine arts while still maintaining secularity.']