TABLE 1.

Experimental tasks.

No.	Tasks of linear hierarchical navigation	Tasks of mixed navigation
1	Find book ≪Shan Hai Jing≫ and add to the bookmark.	Find book ≪Four Generations≫ and join a bookcase.
2	Check the ranking list, find book ≪Records of the States in the Eastern Zhou Dynasty≫, open the book.	Check the ranking list, find book ≪Beijing, Beijing≫, open the book.
3	Find holiday (the Mid-Autumn festival and National Day) opening arrangement of NDLC, 2017	Find the latest announcement, “NDLC” website online announcement.
4	Find the lecture by Xin Deyong: Finding ≪YanRan Mountain Inscription≫ – discussion of the academic value of the discovery, please name the lecture time and venue.	Find the lecture by Wu Wenling: Ancient China recorded by unearthed silk, please name the lecture time and venue.
5	View the online exhibition “Ode to the motherland.”	View the online exhibition “Reunion of one hundred children.”