According to Mr.Supawat that you was offer him of Total package salary+allowance 75,000THB.
He accepted but he ask for sign contract type permanence after end of probation period if possible .
Because his status at the present company is permanence that mean if he direct to leave there to join us should be stability employee same same the present company . So i already explain the all most of employees here is contract period long term and short term that follow of project policy are different. If i misunderstand or this project you were setting of other type then tell me please . I would like to make sure also .