Subject + 宣称 + Clause
宣称 (xuānchēng) means "to declare," "to claim," or "to assert" and is used to report a formal or public statement. It is more emphatic than 说 (to say) and carries an official or assertive tone. It is often followed by a clause describing what was declared.
该公司宣称其产品是全球最安全的。
Gāi gōngsī xuānchēng qí chǎnpǐn shì quánqiú zuì ānquán de.
The company claims that its products are the safest in the world.
他宣称自己与这件事毫无关系。
Tā xuānchēng zìjǐ yǔ zhè jiàn shì háo wú guānxì.
He claims that he has absolutely nothing to do with this matter.
政府宣称将采取更严格的环保措施。
Zhèngfǔ xuānchēng jiāng cǎiqǔ gèng yángé de huánbǎo cuòshī.
The government claims it will adopt stricter environmental protection measures.