Meaning of jì:
骑
(Tw) saddle horse; to sit astride; to ride (a horse, bike etc)
Tā hěn xǐhuān jì mǎ.
他很喜欢骑马。
He really likes to ride horses.
Tā měitiān zǎoshang dōu qù gōngyuán lǐ qí zìxíngchē.
他每天早上都去公园里骑自行车。
He goes to the park to ride a bicycle every morning.
Wǒ jīntiān qí le liǎng gè xiǎoshí de zìxíngchē.
我今天骑了两个小时的自行车。
I rode a bicycle for two hours today.
mounted soldier
Gǔdài de shìbīng tōngcháng huì chéngwéi qíbīng.
古代的士兵通常会成为骑兵。
Ancient soldiers often became mounted soldiers.
classifier for saddle horses
Tā měitiān dūhuì chūqù qí zìxíngchē.
他每天都会出去骑自行车。
He goes out to ride a bicycle every day.