| In order to cover all groups of ages for fun and education, the table topics are categorized into the 3 groups – the ‘educational’ subjets, the ‘general’ subjects, and the ‘professional’ subjects. The educational topics are intended to provide with learning experience a age group under education who can be from infants to college students; the general topics to provide with fun experience all age groups to promote social interaction between people; and the professional topics to provide with in-depth knowledge of a particual field a group of intellectuals to have rich conversation for fun or learing or brain stimulation. Each topic of a subject is further developed into the 3 levels of difficulties to aim at a particual group within a subject category. Level 1 is composed of easy and basic subjects; Level 2 of common and popular subjects; and Level 3 of challenging and unfamiliar subjects.
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