What are the applications required getting Multiple entries Chinese Visa ?

Hi, I would like to inquire the Multiple Entries getting chinese visa either in Manila or travel agents. I'm from Pampanga Angeles City Philippines. I have been applied two times each are single entries, then I got two times also each are double entries. Is it possible I could get multiple entries at this time that I've been in China four times in the country I have mentioned. I never had a trouble every single time I enterred China, I need advice as earliest as you can. Please inform me to any applications needed for tourist. Kindly reply as much as best you can, I truly appreciate your sites thank you very much it helps me a lot !. Have a great day. Ms. Arley