beijing china tighten security next month twice-a-decade communist party congress cancel police leave beijing limit tourism tibet clamp spread political rumor high-level meet china typically accompany security crackdown well uncharacteristically smog-free blue sky stability-obsessed party want run risk anyone anything offer distraction thousands policemen provinces send chinese capital reinforce source direct knowledge matter tell reuters second source tie country security force cite conversations senior police officer say police leave beijing cancel start early september beijing communist party chief cai qi wednesday ask city 120 percent effort ensure safety congress official beijing daily say must hold line social control eliminate destabilize factor hold line cyber security resolutely crack political rumor harmful news cai say beijing large market metal build materials shutter friday relocate hebei province take 10,000 industry workers stall owners accord beijing daily market unceasing growth create messy environment migrants congregate paper say without mention crucial party gather many tighten security measure target migrants id check metro station patrol outside government ministries ensure petitioners town round immediately attempt make scene 2,000 delegate converge beijing congress stay hotels across city security get tight open near mean protest quickly shut china ongoing clampdown cyberspace see whatsapp message service run facebook periodically unavailable past weeks certain gifs use image president xi jinping post group chat messenger app wechat china internet regulator statement reuters say government legal right prevent spread violent terrorist illegal information well-known global app whatsapp really proactively take step block dissemination spread illegal information say without elaborate make specific mention wechat new limit place discussion private group chat rule release begin september make company group owners accountable breach content rule china cyber watchdog monday also impose large possible fin 100,000 yuan 15,110 tech giants tencent hold ltd baidu inc weibo corp fail censor online content measure far restrict keep beijing secure measure also introduce strategically sensitive place part china security heighten port along yangtze river maritime safety administration say last week consider curb load unload hazardous flammable chemicals oct 11 oct 28. travel foreign tourists tibet also restrict travel agents say tibet always sensitive beijing give opposition chinese rule exist within tibetan community even normal time foreigners need permission go official china international travel service ltd say government tell foreigners allow visit tibet oct. 18-28 congress three travel agencies confirm ban would lift late october organizers discussion politics middle east cancel event beijing worry potential pressure authorities source direct knowledge matter tell reuters word democracy use advert sensitive way still think best cancel source say decline name feng xiaogang famous chinese film director know work brush sensitive issue limit censorship announce last week sept 30 release youth late film delay feng give explanation however source tie censor tell reuters authorities consider risky screen film congress partially set china 1979 war vietnam touchy subject fear could spark debate morality necessity conflict around beijing efforts also ramp ensure sky remain blue congress pollute city notorious smog city handan near beijing order steel mill halve output month early usual mid-november cutbacks aim curb air pollution accord media report round inspections authorities check health safety environmental requirements leave small businesses close days weeks months owners employees say factories outskirts beijing even make luxury goods close days inspections carry accord one employee decline name low-end fast food-type restaurants beijing also order close ostensibly prevent fire risk limit pollution residents say many inspections moment say pancake seller give family name liu suppose make shut leave nothing chance china increase security social control congress