https://www.hkeaa.edu.hk/en/hkdse/hkdse_subj.html?A2&2&15
https://www.edb.gov.hk/attachment/en/curriculum-development/kla/pshe/Hist_Curr_Guide_S1-3_Eng_final_10072019.pdf
https://www.edb.gov.hk/attachment/en/curriculum-development/kla/pshe/Hist_C%26A_Guide_e_clean.pdf
