Battle of Colors
True colors vs Pseudo colors
RGU vs WB1
Elementals vs Spirits
Science vs Psychology
Theory vs Law
Conjuration vs Animation
Tribal spells (limited amount, ~10-15 per side, all rarities)

Language and spelling of card names, characters, and places
Cantonese using Jyutping romanization
Use this dictionary to find Jyutping of Chinese characters:
http://www.mdbg.net/chindict/chindict.php

Block layout
So Ling 素靈 (element spirit). Kin Kwan 乾坤 (earth heaven). Sik Zeoi 色罪 (color sin).

1st set So Ling:
Focus: Elementals vs Spirits

2nd set Kin Kwan only: returning mechanics Extort (wb1) and Channel (rgu)
Focus: Minor races: Cat Rat Merfolk Dwarf Treefolk

3rd set only: new mechanics: Censor (wb1), Develop (rgu)
Focus: Minor races: Human Thrull Bird Lizard Beast ; Colorless mana, including Basic Land - Vacuum