Taipei, Jan. 29 (CNA) Two Taiwanese prosecutors were questioned by Chinese state security personnel at their hotel during a trip to China's Henan Province in early January, the Mainland Affairs Council (MAC) said Thursday. The Chinese state security officers already had personal information on the prosecutors, including "when they were assigned to their posts, their work locations and job titles," MAC deputy head and spokesperson Liang Wen-chieh (梁文傑) said at a regular news briefing in Taipei. However, he noted that in some cases, Chinese authorities have used a Taiwanese person's relatives in China to pressure or threaten them. The Chinese authorities are exploiting Taiwanese public servants' "lack of risk awareness and vigilance" to continuously expand their infiltration networks targeting Taiwan, he added. He said Thursday that the two prosecutors' cases were separate from the cases he referred to on Jan. 16.