You do not need to memorise the periodic table for the gaokao. You need four trends and the electron-shell reasoning that produces them.
Atomic radius decreases across a period and increases down a group. Across a period, more protons pull the same shell in tighter; down a group, each new shell adds distance.
Ionisation energy increases across a period and decreases down a group. It is hard to remove an electron from a small, tightly held atom and easier from a large, loosely held outer shell.
Electronegativity increases across a period and decreases down a group. Fluorine is at the top; caesium is near the bottom.
Metallic character decreases across a period and increases down a group — the mirror image of electronegativity.
Any exam question on trends comes down to picking the right two elements and applying one of these four rules. Do not try to memorise specific values.