Big Nose's real name is "Chen Jiaju", nicknamed "Mighty Pill", and he is the first friend Liangkun met at the Junior Police Academy.

Chen Jiaju's father is also a policeman.

During the British rule in Hong Kong, the British believed that outsiders were more reliable than locals, so they pursued a long-term policy of partition and non-localization in policing affairs, employing a large number of Indians as police officers, supplemented by some local Cantonese police. After the rise of Indian nationalism and the Chinese Revolution, the British turned to the hope of bringing in Chinese who had no connection with Guangdong but understood Chinese culture as police, so after the Hong Kong seamen's strike in 1922, Weihai was identified by the British authorities in Hong Kong as the new source of police.

As a result, Shandong steamed buns, a northern food, have also become an important dish in the canteen of the Hong Kong Police Station.

In Hong Kong, the management of these people is in its own right, and although it is commonly known as "Shandong Cha", "Shandong Police" or "Lu Police", the standard official name is "Weihaiwei Police".

After 1949, a large number of non-Weihai Shandong people, and even people from Henan, Zhejiang, Sichuan, Tianjin, Northeast and other provinces were forced to use the name of Weihai people to be admitted to the "Weihaiwei Police".

Among these "Weihaiwei policemen", there is Chen Jiaju's father Ma Rulong, although he was born in Wuhu, Anhui Province, but his ancestral home is Linzi, Shandong, which can be said to be reasonable.

That's right, Chen Jiaju's father is called Ma Rulong.

At that time, most of the Weihaiwei police could not speak English or Cantonese, and their understanding of Hong Kong society was limited. As a result, they are often grouped into the same group and their officer numbers are different from those of ordinary local police officers. Due to the speech barrier and the fact that they are less likely to be on patrol duty in contact with the market, most of them are stationed in the New Territories to guard reservoirs, the Traffic Wing, the Emergency Unit or the Peak District of Hong Kong Island and the Governor's Office.

And Ma Rulong was born in a fisherman's family, so it was logical to become a marine policeman.

Although Hong Kong is only a small place, it is located at the heart of the waterway, and there have been pirates for a long time, the most famous being Cheung Po Tsai (1783-1822), who was entrenched on Cheung Chau Island, and the British can only be regarded as the kind of pirate disguised as a country among many pirates.

The Hong Kong police have to deal not only with law and order on the island, but also with pirate attacks.

On May 1, 1948, the official English name of the Marine Police was changed from "waterpolice" to "marinepolice", while the Chinese name remained unchanged, and the Marine Police Criminal Investigation Department was officially established.

During his tenure as the 24th Governor of Hong Kong (1964-1971), corruption was commonplace in Hong Kong's civil servants, with ambulance workers collecting "tea money" before admitting patients, firefighters charging "throat opening fees" before putting out fires, and even waiters in public hospitals demanding "tips" from patients. As for public services such as waiting for public housing and applying for admission, members of the public have to bribe the public officials concerned first.

At that time, the problem of corruption in the police force was the most serious among all government departments, and almost everyone in the land police at that time received or accepted bribes by covering up various criminal activities, and those who refused to accept them either went to guard the reservoir or went to work as a marine police, and only the marine police became a relatively clean place.

In 1971, when MacLehose took over as the 25th Governor of Hong Kong, in order to clean up corruption, in view of the fact that the land police at that time were almost not clean, they were afraid that they would eat bowls of noodles and reverse the bottom of the bowl, ventilate and report information, and make branches, so he transferred personnel from the Marine Police to fill the vacancies in the land police, and Ma Rulong was one of them.

Ma Rulong, who has always been at the forefront of the anti-pirate operations, has brought his jealous and hateful style among the marine police to land, and soon brought himself to death - he was shot dead on the way home from work, and his family was also killed - his eldest son was beaten into an idiot.

In order to avoid the enemy and avoid being cut down and eradicated, Ma Rulong's second son changed from "Ma Gangsheng" to "Chen Jiaju", using his mother's surname, and even changed his name. Moreover, as soon as the Junior Police Academy was established, Chen Jiaju was immediately recruited as the first batch of cadets.

Not only Chen Jiaju, but also Wang Bao, nicknamed "Partridge Cai", and Xiahou Zhen, nicknamed "One-legged Gold", who were classmates of the police academy at the same time as Liangkun, are also children of the "landing" marine police.