HOLIDAY VISA

Hi, we are planning to go to China in October. We are living in Ireland for past 7 years but we are orriginally from Poland, we have polish passports. Would that be still the same. do we just need to go to Chnesse embassy. What document do we need to bring with us. Do we have to book an appointment or is it possible to aply on line? I know its volid for only 3 months so I think its a bit early now. Thank you