Hi dear Farid,
1. The symbols of wearing sash two rounds on our waist is "Body & Mind".
2. One knot on the sash is regular for new arrivals. Two knots are for the people who become as close partners and part of Kung Fu To'a family. So, To'a can count on them as responsible members.
3. Jinjaiy = Temple
Congaiy = Think
Bato Kung Fu Kaiy = United
Baiyaromeh = Master or Master's helper
Mumaiy = Form or Kata
Thank you.