<p>Nine months ago he was burned by corrosive liquid hurled during anti-government protests, but Hong Kong police officer Ling says he has no regrets and remains devoted to being a law enforcer.</p>.<p>Officers like Ling have formed the spear tip of Beijing's pushback against huge and often violent pro-democracy protests in the restless finance hub.</p>.<p>Seven months of clashes last year have left the city bitterly divided with swathes of the population loathing police -- and many officers feeling they have been unfairly vilified.</p>.<p>Now the police have been given expanded powers under a sweeping new national security law imposed by Beijing that aims to crush the democracy movement once and for all.</p>.<p>"It's undeniable that Hong Kong is part of China, it's reasonable to set up a national security law on Chinese territory," Ling told AFP in an interview at police headquarters the week before the new law was enacted.</p>.<p>"Every law is a tool. Your decision to violate this law makes us enforce it," the 38-year-old added, asking to use a pseudonym because he feared reprisals from protesters.</p>.<p>AFP's interview with Ling -- and a second officer struck last year by an arrow -- were arranged through the police force and a press officer remained present throughout.</p>.<p>Over the past year police have arrested more than 9,000 people during clashes and demonstrations against Beijing's tightening grip on the semi-autonomous city.</p>.<p>Rights groups accuse riot officers of routinely deploying excessive force during arrests, crowd dispersals and in detention.</p>.<p>But police have rejected all allegations of brutality, saying the force has matched the violence shown by protesters. No officer has been fired for their actions.</p>.<p>Ling has paid a personal price for his work -- his neck and chest sport a visible patch of twisted skin.</p>.<p>He was struck by corrosive liquid on October 1 when unrest swept through the city on China's National Day. Others, including reporters, were wounded in the same attack.</p>.<p>Ling's uniform dissolved in front of his eyes.</p>.<p>The initial searing pain faded as his nerve endings dissolved.</p>.<p>But the healing process was excruciating as they grew back, aided by five surgeries, including skin grafts.</p>.<p>Ling, who returned to street duty in January, said he tried not to think about his attacker.</p>.<p>"It would be a good thing if he was caught, but if not, it's meaningless to go down that blind alley," he said.</p>.<p>Police say around 600 officers were injured in last year's protests. Last week an officer was stabbed in the shoulder during demonstrations against the new security law.</p>.<p>At least 2,600 protesters and bystanders have been treated in hospital although the real figure is likely to be higher because many sought underground treatment, fearing arrest onwards.</p>.<p>Hong Kong's police once dubbed themselves "Asia's Finest" and they continue to receive full-throated support from the local government, Beijing and those opposed to the protests.</p>.<p>But in many neighbourhoods officers are insulted with graffiti and angry heckles.</p>.<p>A survey by the Hong Kong Public Opinion Research Institute in May showed a record 44 per cent of respondents rated the force's performance at "zero".</p>.<p>Sam, a 40-year-old police officer and father of one, was struck in his leg by an arrow during some of the most intense clashes last year -- the November siege of Polytechnic University.</p>.<p>"Protests always happen in Hong Kong but I had not imagined things would end with such violent scenes," he told AFP, asking just to use his first name.</p>.<p>He described himself as politically neutral but said he tried not to think about the demands protesters make, instead of focusing on his job.</p>.<p>He said he was "disappointed" to see some residents now openly loathing police.</p>.<p>"Some people misunderstand us, or they have not seen the whole thing clearly and are influenced by rumours," he said.</p>.<p>"I try not to discuss with friends. It's very difficult to persuade one another."</p>.<p>Ideological polarisation now permeates Hong Kong.</p>.<p>Ling grew up in the working class district of Sheung Shui and said he wanted to join the police after he saw triad gangsters extorting locals.</p>.<p>He said he remained proud to wear the uniform but that his social circle had changed -- especially after earlier student-led protests in 2014.</p>.<p>"Quite a few friends drifted apart from me. They chose to put their political views and prejudice towards Hong Kong police in front of our friendship," he said.</p>.<p>Link has asked family to keep his job quiet and keeps a low profile on social media.</p>.<p>Many Hong Kong officers have opened accounts on mainland China's heavily censored Twitter-like Weibo platform where they are lavished with praise from readers -- and even professions of love.</p>.<p>Ling found new online friends that way.</p>.<p>"They left supporting messages on Weibo... That made me feel warm inside," he said.</p>.<p>"I've got more friends, friends who I've never met."</p>
<p>Nine months ago he was burned by corrosive liquid hurled during anti-government protests, but Hong Kong police officer Ling says he has no regrets and remains devoted to being a law enforcer.</p>.<p>Officers like Ling have formed the spear tip of Beijing's pushback against huge and often violent pro-democracy protests in the restless finance hub.</p>.<p>Seven months of clashes last year have left the city bitterly divided with swathes of the population loathing police -- and many officers feeling they have been unfairly vilified.</p>.<p>Now the police have been given expanded powers under a sweeping new national security law imposed by Beijing that aims to crush the democracy movement once and for all.</p>.<p>"It's undeniable that Hong Kong is part of China, it's reasonable to set up a national security law on Chinese territory," Ling told AFP in an interview at police headquarters the week before the new law was enacted.</p>.<p>"Every law is a tool. Your decision to violate this law makes us enforce it," the 38-year-old added, asking to use a pseudonym because he feared reprisals from protesters.</p>.<p>AFP's interview with Ling -- and a second officer struck last year by an arrow -- were arranged through the police force and a press officer remained present throughout.</p>.<p>Over the past year police have arrested more than 9,000 people during clashes and demonstrations against Beijing's tightening grip on the semi-autonomous city.</p>.<p>Rights groups accuse riot officers of routinely deploying excessive force during arrests, crowd dispersals and in detention.</p>.<p>But police have rejected all allegations of brutality, saying the force has matched the violence shown by protesters. No officer has been fired for their actions.</p>.<p>Ling has paid a personal price for his work -- his neck and chest sport a visible patch of twisted skin.</p>.<p>He was struck by corrosive liquid on October 1 when unrest swept through the city on China's National Day. Others, including reporters, were wounded in the same attack.</p>.<p>Ling's uniform dissolved in front of his eyes.</p>.<p>The initial searing pain faded as his nerve endings dissolved.</p>.<p>But the healing process was excruciating as they grew back, aided by five surgeries, including skin grafts.</p>.<p>Ling, who returned to street duty in January, said he tried not to think about his attacker.</p>.<p>"It would be a good thing if he was caught, but if not, it's meaningless to go down that blind alley," he said.</p>.<p>Police say around 600 officers were injured in last year's protests. Last week an officer was stabbed in the shoulder during demonstrations against the new security law.</p>.<p>At least 2,600 protesters and bystanders have been treated in hospital although the real figure is likely to be higher because many sought underground treatment, fearing arrest onwards.</p>.<p>Hong Kong's police once dubbed themselves "Asia's Finest" and they continue to receive full-throated support from the local government, Beijing and those opposed to the protests.</p>.<p>But in many neighbourhoods officers are insulted with graffiti and angry heckles.</p>.<p>A survey by the Hong Kong Public Opinion Research Institute in May showed a record 44 per cent of respondents rated the force's performance at "zero".</p>.<p>Sam, a 40-year-old police officer and father of one, was struck in his leg by an arrow during some of the most intense clashes last year -- the November siege of Polytechnic University.</p>.<p>"Protests always happen in Hong Kong but I had not imagined things would end with such violent scenes," he told AFP, asking just to use his first name.</p>.<p>He described himself as politically neutral but said he tried not to think about the demands protesters make, instead of focusing on his job.</p>.<p>He said he was "disappointed" to see some residents now openly loathing police.</p>.<p>"Some people misunderstand us, or they have not seen the whole thing clearly and are influenced by rumours," he said.</p>.<p>"I try not to discuss with friends. It's very difficult to persuade one another."</p>.<p>Ideological polarisation now permeates Hong Kong.</p>.<p>Ling grew up in the working class district of Sheung Shui and said he wanted to join the police after he saw triad gangsters extorting locals.</p>.<p>He said he remained proud to wear the uniform but that his social circle had changed -- especially after earlier student-led protests in 2014.</p>.<p>"Quite a few friends drifted apart from me. They chose to put their political views and prejudice towards Hong Kong police in front of our friendship," he said.</p>.<p>Link has asked family to keep his job quiet and keeps a low profile on social media.</p>.<p>Many Hong Kong officers have opened accounts on mainland China's heavily censored Twitter-like Weibo platform where they are lavished with praise from readers -- and even professions of love.</p>.<p>Ling found new online friends that way.</p>.<p>"They left supporting messages on Weibo... That made me feel warm inside," he said.</p>.<p>"I've got more friends, friends who I've never met."</p>