i am working in ningbo from 3 month...now i am applying for family s1 type in india

Dipak
and visa agent ask me the 6 month bank statement with minimum balance of 1.80 lakh...my question once my family get the visa..can i use some amount of money from that amount...or should i maintain the same amount till my family enter the china...will immigration officer check my statement or anything about my bank balance.