Go to the right. There is a corner near the wall. Press the key, go up to the top floor, and then go down. Be careful. You may fall to your death. Pay attention to preservation. Then enter the top of the second "Buddha" and the top of the second (counting from left to right). Press the secret passage between the first and second BOSS. Pay attention to archiving. It is recommended to skip once and save once, because after jumping in.