4 sentences

1. 全国人民热烈庆祝开国大典。

   quán guó rén​mín rè​liè qìng​zhù kāi​guó dà​diǎn.

   The people of the whole country warmly celebrated the founding ceremony of the PRC.

   Source: Dong Chinese Dictionary

2. 他们在礼堂举行了开学大典。

   tā​men zài lǐ​táng jǔ​xíng le kāi​xué dà​diǎn.

   They held a grand opening ceremony in the auditorium.

   Source: Dong Chinese Dictionary

3. 新登基的国王今天举行了即位大典。

   xīn dēng​jī de guó​wáng jīn​tiān jǔ​xíng le jí wèi dà​diǎn.

   The newly enthroned king held his coronation ceremony today.

   Source: Dong Chinese Dictionary

4. 《永乐大典》是中国古代著名的类书。

   《 Yǒng​lè dà​diǎn》 shì Zhōng​guó gǔ​dài zhù​míng de lèi​shū.

   The Yongle Encyclopedia is a famous ancient Chinese encyclopedia.

   Source: Dong Chinese Dictionary