How decisive could that be for the Second Sino-Japanese War?
Imagine the German advisors are all out of China by October 1937 and have accepted a Japanese request to debrief them thoroughly on everything they know about Chinese weapons, tactics, plans, equipment strengths and weaknesses.
BTW - The Italian officers who advised the Chinese Air Force prior to the Sino-Japanese War freely shared information with the Japanese once the Sino-Japanese war began and they departed China.
Imagine the German advisors are all out of China by October 1937 and have accepted a Japanese request to debrief them thoroughly on everything they know about Chinese weapons, tactics, plans, equipment strengths and weaknesses.
BTW - The Italian officers who advised the Chinese Air Force prior to the Sino-Japanese War freely shared information with the Japanese once the Sino-Japanese war began and they departed China.