The direction used in this structure is usually 东, 西, 南, 北, 上 or 下.
他朝南走了半个小时才发现方向错了,所以又回头朝北走。
Tā cháo nán zǒu le bàn gè xiǎo shí cái fā xiàn fāng xiàng cuò le ,suǒ yǐ yòu huí tóu cháo běi zǒu 。
He walked (towards) south for half an hour and fi nally realized the direction was
wrong, so he turned back and walk (towards) north.
[1] Yip, P. C., Rimmington, D., Xiaoming, Z., & Henson, R. (2009). Basic Chinese: a grammar and workbook. Taylor & Francis.