If two words form a unit the particle de is omitted.
德 | 国 | ( | 的 | ) | 人 | 。 |
dé | guó | _ | de | _ | rén | _ |
virtue | country | _ | particle | _ | person | _ |
Germany | ( | particle | ) | person, human being | 。 | |
German. |
汉 | 语 | ( | 的 | ) | 书 | 。 |
hàn | yǔ | _ | de | _ | shū | _ |
Chinese ethnicity | language | _ | particle | _ | book | _ |
Chinese language | ( | particle | ) | book | 。 | |
Chinese language book. |