The imperial palace, the official residence of the emperor and his family, is the most vital architecture in ancient China.
There were certain architectural features that were reserved solely for buildings built for the Emperor of China. One example is the use of yellow roof tiles; yellow having been the Imperial color, yellow roof tiles still adorn most of the buildings within the Forbidden City (gù gōng 故宫). The Temple of Heaven (tiān tán 天坛), however, uses blue roof tiles to symbolize the sky.

不买账
Not buy it.

【发音】bù mǎi zhàng

【释义】比喻不承认对方的长处或力量，不佩服或不服从。
            Be unwilling to accept someone’s authority or advantage; not go for it.

【例1】对于官僚主义，群众是不买账的。
           The masses won’t go for bureaucracy.

【例2】房子降价了，可消费者还是不买账。
           Though the house price has fallen down, customers still won’t go for it.

     
In ancient China, people calculated time according to the position of the sun, the moon and stars in the sky. However, such method was not very accurate. Afterwards, by watching the sun, someone designed a kind of time-counter to identify the time—the sundial (rì guǐ 日晷).

History
The word Yuefu (yuè fǔ 乐府) came first into being in Qin Dynasty (qín cháo 秦朝)(221 BC-206 BC). Yue (yuè 乐) means music, Fu (fǔ 府) means bureau, put together Yuefu means music bureau. It laid its foundation in the Han Dynasty (hàn cháo 汉朝) (206 BC-220 AD), and became a royal government Musical Department for collecting, writing or performing folk songs and ballads in 112 BC. After then people called poems which were composed in this folk song style Yuefu.