This license plate with the number 1 belongs to the commissioner of police.
Examples (Wiktionary)
Mandarin
环境保护署、警务处及食物环境卫生署在环保大道会进行不定时的联合行动,加强巡查以打击重型泥头车漏出泥石及超速等违规行为。
環境保護署、警務處及食物環境衞生署在環保大道會進行不定時的聯合行動,加強巡查以打擊重型泥頭車漏出泥石及超速等違規行為。
huán jìng bǎo hù shǔ , jǐng wù chù jí shí wù huán jìng 衞shēng shǔ zài huán bǎo dà dào huì jìn xíng bù dìng shí de lián hé xíng dòng , jiā qiáng xún chá yǐ dǎ jī zhòng xíng ní tóu chē lòu chū ní shí jí chāo sù děng wéi guī xíng wèi .
The Environmental Protection Department, Police Force and the Food and Environmental Hygiene Department take non-scheduled joint operations at Wan Po Road to fight illegal acts like spilling of mud and speeding by heavy dump trucks.