here are the Half-oriental Dragons for you.
All Oriental Half-Dragons are of the same size as the base creature and all gain the hit die improvement.
Speeds: Only the Half-Li Lung Dragon can have wings. Half-Chaing Lung and Half-Lung Wang swim twice as fast as their base
speed. Half-Li Lung can burrow at 2/3 of their base speed. Half-Lung Wang lose 10 off their base speed.
Half Chiang Lung
Immunity to Water, No breath Weapon. Special Ability: Water Breathing or Remove Curse 1/day.
+7 Natural AC
+6 Str, +4 Con, +4 Int, +6 Wis, +6 Cha
ECL: 4.4 or +4
A possible breath weapon (if wanted, sine Chiang Lung do not have one would be a Geyser breath similar to what the decanter of endless water can do) (If so add +1 Ecl)
Half Li Lung
Immunity to Earth, No Breath Weapon. Special Ability: Roar or Stone Shape 1/day. (Roar causes deafness for up the the character's con mod in rounds 1/day).
+6 Natural AC
+8 Str, +4 Con, +2 Wis, +2 Cha
ECL: 4.3 or 4
You may wish to make Roar a Breath Weapon.. not sure
Half Lung Wang
Immunity to Fire, Steam (Fire) Breath Weapon (d10s). Special Ability: Scaly Command 1/day or Water Breathing.
+7 Natural AC
+10 Str, +4 Con, +2 Int, +2 Wis, +2 Cha
ECL: 5.9 or 6
Pretty Much like a standard half dragon.
Half Pan Lung
No Immunity or Breath Weapon. Special Ability: Water Breathing, Scaly Command 1/day or Water Fire (1-3 d6)
+6 natural AC
+6 Str, +4 Con, +2 Int, Wis, Cha
ECL: 3.8 or 4
One of the weakest so far. Water Fire is a special abilty 2 of the Oriental Dragons possess. When in water they can surround themselves with Watery Fire that deals damage when hit. (1d6/5 levels max 3d6 for Pan Lung)
Half Shen Lung
Immunity to Lightning and Poison. Fire Vulnerability. No Breath Weapon. Special Ability: Water Breathing or Scaly Command 1/day , or Vermin Barrier 1/day(protection from Vermin lower in HD than the half dragon, negated if he attacks them), or Watery Fire (2-4 d6)
+7 natural AC
+6 Str, +2 Dex, +4 Con, +2 Int, +4 Wis, +4 Cha
ECL: 4.9 or 5
Pretty Strong. This ones Watery Fire starts at 2d6 and goes up like the Pan Lung
Half T'ien Lung
Immunity to Fire, Fire Breath Weapon (d10s). Special Ability: Water Breathing or Pyrotechnics 1/day.
+8 Natural AC
+10 Str, +4 Con, +4 Int, +6 Wis, +6 Cha
ECL: 5.8 or 6
Half Tun Mi Lung
Immune to Water and Air, no Breath Weapon. Special Ability: Water Breathing or Lightning Bolt 1/day.
+7 Natural AC
+8 Str, +4 Con, +2 Int, +4 Wis, +4 Cha
ECL: 4.9 or 5
There Ya Go =)