The province has already stepped up efforts in entry-exit management last year and continues to tighten the security this year, Shohrat Zakir, the Xinjiang chairman, told Xinjiang's local provincial council.
Many terrorists who carried out attacks in the region in recent years received training abroad and then returned illegally.
Some also crossed the border illegally to flee, Aniwar Turson, a top ruling Communist Party of China (CPC) official of Xinjiang's Kashgar prefecture, was quoted as saying by the state-run media. Kashgar prefecture borders Pakistan-occupied Kashmir (PoK) and Afghanistan.
"Xinjiang, which borders eight countries, including Pakistan and Afghanistan, has been China's main battleground in the fight against terrorism," the daily reported.
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China's official media refers to PoK borders with Xinjiang as Pakistan border without mentioning its disputed status.
It is the same region through which the USD 46 billion China-Pakistan Economic Corridor (CPEC) is being built.
Mention of Pakistan in relation to the problem of terrorism in Xinjiang is rare in the Chinese media as ETIM has in the past had training bases in Pakistan's tribal areas.
However, a large number of the militants from the Muslim Uyghur majority province reported to have crossed over to Syria through Turkey and joined Islamic State.
Last year, Chinese official media reported that Chinese and Pakistan border troops have launched border patrolling to curb infiltration.
China has also launched Quadrilateral Cooperation and Coordination Mechanism along with Pakistan, Afghanistan and Tajikistan to counter terrorism in the Xinjiang border region.
China apprehends that many of them return to stir trouble in Muslim Uyghur majority Xinjiang which largely remained peaceful last year after years of turmoil as China stepped up security.
(Reopens FGN 12)
A terrorist attack left five dead in Hotan's Moyu county on December 28. Two top officials of the prefecture have been put under investigation.
Azez Musar, a senior official of southern Xinjiang's Hotan prefecture, was quoted as saying that terrorist cells are particularly active in border areas in Xinjiang.
"We must improve our ability to detect suspicious activities in those areas and conduct strict inspections near the borders in accordance with the law," he said.
Chen sees keeping the region stable as the overriding political goal. Chen decided Xinjiang officials would concentrate first on maintaining social stability. The other main goal is the region's social and economic development.
He also warned officials that they would be evaluated based on the security situation.