Name/Number + 号
号 (hào) means "number," "designation," or "name" and is used to label or identify things by number. It appears after a number or name to give an official designation, as in 三号 (number three) or as part of ship and spacecraft names.
我住在三号楼二零五室。
Wǒ zhù zài sān hào lóu èr líng wǔ shì.
I live in Building 3, Room 205.
请到五号窗口办理手续。
Qǐng dào wǔ hào chuāngkǒu bànlǐ shǒuxù.
Please go to window number five to handle the paperwork.
"神舟十五号"成功返回地球。
"Shénzhōu shíwǔ hào" chénggōng fǎnhuí dìqiú.
Shenzhou 15 successfully returned to Earth.