Level1coding/content	Number/times of mention	Level 2 coding/content	Level 3 coding/content
Respect for others	7/7	psychological changes	1 Impact of personal change
Understand the etiquette	6/7
Reduced loneliness	5/5
Anti-frustration ability increased	12/12
Body Shape change	4/5	physical changes
Smile increases	8/9
Physical fitness enhancement	13/14
Lovers feel more secure	1/3	evaluation of changes,	2 Impact of society change
Positive social evaluation	4/4	evaluation of changes,
Equal social status	5/6	communication changes
Increased social trust	3/5
Feelings of inferiority decrease	4/7
Bonus reward	11/15	future financial security	Impact of future changes
Fixed wage protection	9/13	future financial security
Expand employment channels	5/7	future career basis
Improved self-care ability	8/10	future career basis