1 sentence

1. 香港特别行政区基本法于1997年正式生效。

   Xiāng​gǎng tè​bié xíng​zhèng​qū jī​běn​fǎ yú 1997​nián zhèng​shì shēng​xiào.

   The Basic Law of the Hong Kong Special Administrative Region officially came into effect in 1997.

   Source: Dong Chinese Dictionary