Although before the war, the air force also built some secret field airfields in the mountainous areas of Yi County and Mancheng, to which the Shanxi-Chahar-Hebei Border Region belongs. However, in order to conceal the entire campaign intent, these airfields were simply impossible to use until the campaign attempt was completely exposed, and in order to ensure the suddenness of the campaign launch.

Even in the mountainous areas of western Hebei, the current situation of friend and foe has been reversed. However, before the hostile situation around western Hebei has been completely and completely eliminated. These secretly constructed field airfields are to remain secret until the campaign is launched, and this chapter must be logged in until the campaign attempt is fully launched