Which periods did the creation and development of Chinese classical gardens go through? Explain the characteristics and achievements of these periods.

① generation period: the royal garden planning grand, majestic, become the mainstream of gardening activities in this period: Yin, Zhou simple 囿; Qin and Han construction of palaces and "a pool of three mountains"; Western Han landscape architectural garden. ②Turning point: the initial establishment of the garden aesthetic ideas. North and South Dynasty natural landscape garden; Buddhist temple jungles and tourist attractions. ③ heyday: garden development has entered the heyday, as a garden system, the style characteristics of the basic formation. Sui Dynasty Landscape Architecture Palace; Tang Dynasty Palace and amusement parks, Tang Dynasty natural garden-style apartments; Tang and Song Dynasty Landscape Garden. ④Mature period and late maturity: the development of gardens, on the one hand, inherited the mature tradition of the previous period, and more refined, on the other hand, exposed some tendencies of decline. Northern Song Dynasty landscape palace; Yuan, Ming and Qing Dynasty palace

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