C58 Xiao wen's cavalry reform(part i)

The sound of horses' hooves sounded out beside Xiao Wen's ears, as a group of riders swept past him, bringing about a cloud of dust.

Xiao Wen immediately covered his nose and mouth as he squinted his eyes to prevent the smoke from entering his mouth, windpipe and eyes.

Because they had Cai Zhun's help, after the first letter from a Manchurian spy