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Use the name then instead of pinyin which appeared after this paper, just like the old name "MacLane" in Eilenberg–MacLane.

The earliest reference for the connection between Stiefel–Whitney classes and Steenrod squares seems to be Wen-tsün Wu, Classes caractéristiques et i-carrés d'une variété, C.R. Acad. Sci. Paris 230, 508–511 (1950), followed a few years later by René Thom, Quelques propriétés globales des variétés différentiables, Comment. Math. Helv. 28, 17–86 (1954).

Both works are discussed in this article:

Carlo Beenakker
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