Shanghai-based online travel agency Lvmama reports that bookings for tours involving museums increased by 45 percent year-on-year in the first four months of 2019.

Shanghai resident Ji Hongjuan enjoys taking her 12-year-old daughter, Wen Lan, to China's historical sites and museums. In the past few years, they have visited such places as the Palace Museum, the Shaanxi History Museum and the Nanjing Museum.

"I usually ask my daughter to be my guide," Ji says.

"She searches for information about where we will visit and takes me there, which I think is a great way to cultivate her curiosity."

Ctrip says searches for family-travel destinations increased by 200 percent before Dragon Boat Festival. Shanghai, Shenzhen, Guangzhou and Hangzhou were popular destinations. Parents preferred traditional activities during the festival.

Overseas travel agencies have caught wind of this huge market. Costa Venezia, the first ship designed by Costa Cruises, the Italian brand of Carnival Corp, and built specially for Chinese guests, has entered the Chinese market. Many facilities and activities were designed for families.

The family-travel market will continue to grow during the summer vacation from July to August, Ctrip and Lvmama forecast.

Ji Hongjuan plans to take her daughter, Wen Lan, to Sichuan province, where they'll visit the Chengdu Du Fu Thatched Cottage Museum and the Chengdu Wuhou Shrine, because her daughter loves ancient Chinese poetry.

China Tourism Academy head Dai Bin says the market has great potential.

"Our surveys show many parents complain about destinations being too crowded during public holidays," he says.

"Over 40 percent say they're looking for more quality travel products."