What should I do if I'd like to invite a friend from Philippines to visit in china for one month?

It is her first visit in china. I will take care of all her expenses during her visit with me. Do I need to ask the local city bureau in Shenzhen to chop the letter? Dose valid passport, return ticket, insurance, hotel booking, and invitation letter with warranty that I will cover all her expenses during her visit. Will it be enough?

Also please advise how she can apply the application if no available embassy nears her home. Dose she can send direct to the Chinese embassy in manila by post with prepaid return envelop?

thank you