New Work License

My school just obtained its license to employ foreign staff. Is it fairly simple and straightforward from here on? They just need to go to the local PSB with the right documents (cover letter of application, employment licence, my passport copy and medical report?) This issues the the invitation letter which I then have to take to HK or my home country and process in the Chinese Embassy/Consulate? Is this correct? Please let me know if I am missing anything as it is quite urgent and dont know where to find the information!