The Nansha Islands are beautiful islands located in the South China Sea.

In my house, we use soft water for cooking.

This book is difficult to understand because it contains many difficult words.

This ancient document is difficult to read, and it takes time to decipher.

He strongly advocated the theory of southward advancement.

His troops continued their advancement southward.

Our troops began to advance southward.

My friend is working in South Africa.

His opinion is always inoffensive, and everyone can agree with it.

Because he has hearing loss, it's difficult for him to listen to music.