Mao supported it when he transferred 3 divisions of troops of Korean decent to help invade South Korea. He didn't even hesitate it. Only thing was the timing when China was in the midst of a civil war. And remember that Stalin was also informed of the plans of the invasion and supported as well, didn't even hesitate. China hasn't fought a war in decades because you've learned not to repeat your mistakes especially during your fight against Vietnam.
go read your own comment 124
"China used allies to attack other nations. You have North Korea for example when China encouraged it to invade South Korea."
What you are now saying is China eventually AGREED. So you are contradicting your previous statement of China using allies to attack other countries. Do not tell me you cannot tell the difference between these two sentences.
I suggest your read the source you provided yourself page 19-23
Proof of Maoís knowledge lies in the circumstances surrounding the transfer of 23,000 Chinese troops of Korean descent, along with all of their equipment, to North Korea. On January 19, 1950, Kim requested that China return 14,000 of these troops and their equipment.