Shoul i get a visa? (Philippines)

Jemima, you may apply for a crew type if you come to Beijing together with your airline. In this case, you just need to provide the guarantee letter from your airline. Then you can go to visit the wall. If you come alone, I think you should apply for a L type. It requires round-trip air tickets and hotel reservation in Beijing apart from your passport, application form and a recent passport photo. If you apply in Saudi Arabia, you should also provide your legal resident permit there.