The purpose of writing the leaflet is
to let Hong Kong people know more about the famous places in Hong Kong.
為了讓香港市民更了解香港著名的地方
===or ===
The purpose of writing the leaflet is
to promote the famous local places to Hong Kong people.
向港人介紹本地的名勝
If you want to combine the two sentences together, you may write like this:
The purpose of writing the leaflet is to let Hong Kong people know more about the famous places in Hong Kong by promoting the famous local places to them.
其實如果你想translate 句子∕單字…… 你可以用 google翻譯
http://translate.google.com/translate_t