Title: Hai zi men -- er tong xin li fa zhan
Description: Ben shu quan mian chan shu le er tong yu qing shao nian xin li fa zhan de li cheng, Fen bie yi er tong fa zhan de bu tong jie duan zuo wei ge ge bu fen de yan jiu zhong dian:sheng ming zhi chu, Ying er qi, Tong nian zao qi, Tong nian zhong qi yu qing chun qi, Bing fen xi le er tong zai bu tong fa zhan jie duan de shen ti, Ren zhi, She hui xing yu qing gan de fa zhan qing kuang.
Subjects: Er tong xin li xue .