Here is the full list of all 33 Chat with Yu achievements.
Completed Penglin Level 01
Completed Penglin Level 02
Completed Penglin Level 03
Completed Penglin Level 04
Completed Penglin Level 05
Completed Penglin Level 06
Completed Penglin Level 07
Completed Penglin Level 08
Completed Penglin Level 09
Completed Penglin Level 10
Completed Penglin Level 11
Completed Penglin Level 12
Completed Penglin Level 13
Completed Penglin Level 14
Completed Penglin Level 15
Completed Penglin Level 16
Completed Penglin Level 17
Completed Penglin Level 18
Completed Penglin Level 19
Completed Penglin Level 20
Completed Penglin Level 21
Completed Penglin Level 22
Completed Penglin Level 23
Completed Penglin Level 24
Completed Penglin Level 25
Completed Penglin Level 26
Completed Penglin Level 27
Completed Penglin Level 28
Completed Penglin Level 29
Completed Penglin Level 30
Achieved all the stars in the game!
Installed “Penglin!” the new game that Yu is making
Received all the special gifts from Yu ;)