Meaning of zōng:
zōng
踪
Noun
(bound form) footprint; trace; tracks; variant of 蹤|踪[zong1]
Tā xiāoshī de wú yǐng wú zōng.
他消失得无影无踪。
He disappeared without a trace.
Tā zài xuě dì shàng liú xià le qīngxī de zōngjì.
他在雪地上留下了清晰的踪迹。
He left clear tracks in the snow.