man you are not speaking chinese, but maybe you are reading this in chinese because as tiger said you dont understand, let me explain something to you, you can be ambushed with only 2 seconds difference before army hit, you need to use your spies more efficiently. 1. from the moment that the attack is visible(59minutes and 59 seconds) on the enemy screen, he will begin to prepare to take you down if he can, so you need to monitor very very verrrrrrrrrrrrrrryyyyyyyyyyyyyyyyyyyyy closely his gold, to relocate army is expensive and unless his army is coming the precise exact amount of gold to cover that loss of gold, you WILL see it, if you know how to spy, 2. sometmes the army get there 5 to 10 seconds before, so your computer needs to be fast, your fingers need to be fast, and you need a good mouse and smooth surface on which it can move fast so you can spy 2 or 3 times in 6 seconds timing
and if you see army there you need a tab open with your attacking army and click retreat there as fast as possible.DONT refresh the page or the attack is impossible to retreat between 2 to 5 seconds before hit. good luck, learn to spy better and use the information the spies give you such as gold drop, gold increase(army came home loaded) gold movement(v4) etc etc, and not just the info that no army there, no army there. v4 is an incredibly fun game for these moments, v5 is dull because it just messes up the ambush with the huge gold deductions *2.