Customs clearance strategy:
1. First, place a poisonous needle at the position shown in the figure and raise it to the second level. Use it to attack the treasure chest in the red box.
2. Once the poison needle can be upgraded, it will be upgraded to level 3 at the first time and continue to attack the treasure chest. Regardless of the second wave of monsters, continue to hit the treasure chest, reach the yellow circle position in the picture and start attacking monsters.
3. Continue to attack the treasure chest until the treasure chest is broken, get 4 anchors, upgrade to level 3, and knock out the big treasure chest in the red box on the left at the interval of attacking monsters. ? There are four octopuses in this treasure chest, and they have all been upgraded to level 3.
4. Put two frozen stars under the octopus and a row of arrows on the left. The poison needle in the lower right corner has been changed to the frozen star. Fans can't attack high, so they can sell them and exchange them for more arrows.
5, the last wave slightly adjusted the formation. When the monster walks out of the attack range of the front tower, he can sell the front tower and put it in the blank area in front of the radish.
6. Perfect customs clearance.