The themes of the trips include the history of the Chinese Communist Party, the development of China’s innovative technology, and the contribution of world-renowned revolutionary Sun Yat-sen, dubbed the “Father of China.”

According to the notice sent to schools, there are 21 trips available at this point, ranging from two to five days in length, with Guangzhou, Shenzhen, and Hunan among the destinations.

Secondary schools will have to reply to the bureau by late July on which month they can arrange such trips in the coming two years and how many students they can send up north.

One of the two-day trips will see students visiting the Memorial Museum of Generalissimo Sun Yat-sen’s mansion and the former site of the Whampoa Military Academy in Guangzhou.

For another two-day trip, students will head to the Deqing Palace -- built in 1011 during the Northern Song dynasty -- in Zhaoqing city, where they will learn about the ancient imperial examination, also known as “keju,” and Confucianism.

The bureau is also offering two five-day trips, including one that allows students to get to know more about the history of the Chinese Communist Party at the Zunyi Conference Site in Guizhou.

The bureau specified that for trips that last four to five days, students must travel to China by taking the high-speed rail.

However, the bureau didn’t spell out more details on the notice, given that it remains unclear when the West Kowloon station and the borders between Hong Kong and the mainland will reopen.

The notice didn’t disclose guidelines on quarantine arrangements either, adding that authorities will make adjustments according to actual circumstances and border reopening measures at that time.

The Citizenship and Social Development subject will replace Liberal Studies as one of the four core subjects of senior secondary education, and will be included in the Diploma of Secondary Education (DSE) exams starting from 2024.