To get Sky Thunder Fan, you will need chaotic stone. (Or directly get the Fan from official event: Vow of Dragon,Spring Wheel)
To exchange chaotic stone to Sky Thunder Fan, talk to Blacksmith Wang in Weponry feature.
To get chaotic stone, recharge and spend your gold.
To open Star Technique, you click Ctrl+N. Then, click on Godlike Zhu Ge Liang tab.
Then, start max-ing out Godlike Zhu Ge Liang star technique to 16 grade 10 stars. (Required quite amount of chaotic stones)
Godlike Zhe Ge Liang can only be inherited his star technique from Godlike Zhang Jiao,Godlike Zhou Yu or Godlike Xiao Shi Mei.
After that, only you can start saint-ing Godlike Zhu Ge Liang.
Go into Weaponry,find Godlike Zhu Ge Liang's handsome face and start giving him the Sky Thunder Fan untill his loyalty to you
reached 300. On the way to Saint Zhu Ge Liang, you will need more or less 120 chaotic stones.
Hope these will help!