verification letter for changing of manual passport to automatic passport(MRP)?

Dear sir , i have applied for renewal of my ordinary passport to automatic passport in Pakistan . As i already did renew my passport before 6 months ago in Pakistani Embassy in Beijing, as there was unavailability of (MRP) PASSPORTS , the embassy made me the ordinary passport . now that after 3 months i have to go back to china for my graduation i have to change my ordinary passport to (MRP) passport as its the requirment for getting the visa for china . and for that i already applied in Pakistan passport office but as their requirment i have to get the confirmation/verification letter from Pakistani embassy in beijing as i made the last passport from there. kindly help me to solve it out as i am short of time . thanks with best regards.