2 sentences

1. 钱塘江的海塘非常坚固。

   Qián táng Jiāng de hǎi​táng fēi​cháng jiān​gù.

   The seawall of the Qiantang River is very strong.

   Source: Dong Chinese Dictionary

2. 每年秋天，成千上万的游客聚集在这里观看钱塘江大潮。

   měi nián qiū​tiān, chéng​qiān​shàng​wàn de yóu​kè jù​jí zài zhè​lǐ guān​kàn Qián​táng Jiāng dà​cháo.

   Every autumn, thousands of tourists gather here to watch the Qiantang River tidal bore.

   Source: Dong Chinese Dictionary