At Wild Duck Lake resort in Kunming, Yunnan province, an employee demonstrates kungfu fighting over water, using wires, Aug 19, 2013. Visitors can also try the moves from kungfu films. [Photo/Xinhua]

"It is an emergency. All we can do is to tell our tourists to stay together and avoid going out alone at night," he said.

Besides, most of the company's tourists travel to Yunnan by plane rather than by train, he added.

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Sun Liqun, deputy general manager of China International Tourism Service Ltd's domestic destination department, said its tour-group business to Yunnan was normal, although a few individuals canceled their bookings after the terrorist attack.

"We still received some bookings on tour groups to Yunnan province today," Sun told China Daily on Monday.

The travel agency has groups departing to the province every day, and the travelers usually stay in Kunming for two of their six travel days, she added.

Some tourists said they will not change their travel plans because of the attack, but added that they worry about safety in the city.

"I will not go to Yunnan province before the terrorists are arrested, but my travel plan in May will not change," said Wang Dan, a 30-year-old Beijing man.

Wang said he believes that by the time he goes to Yunnan, the province will be safe.

All flights of Lucky Air, one of Yunnan's main carriers, are operating as normal, said a manager from Hainan Airlines, the parent company of Lucky Air.

"The only difference is that the airport has upgraded its security level, and we need to cooperate with them," he said.

Some airlines also will enhance their in-flight security forces in some routes and flights, business insiders said.