if you just wanna learn Mandarin,<单身男女><山楂树之恋><非诚勿扰><失恋33天>are good movies,they are very popular among young people in China,but if wanna study chinese culture i think <墨攻>is a good choice.its about Mohist thought which include universal love,besieged city.Mohist is the one of thought in pre-Qin period,moreover i think u heard Zhuangzi(庄子)Confucius(孔子)Han Fei Zi(韩非子)and so on.they were wise philosopher in ancient of China.