I have also tried the 8-cannon strategy before, but found that it couldn't last in the later stages. Because each round of zombies attacks for 10 turns, the 8 cannons can only hold for 4 turns at first, then use squash, chili, and cherry bombs to hold for 1 turn, then the 8 cannons grow back to hold for another 4 turns, totaling 9 turns held, and the last turn is always spent taking hits ~~~~~~~~ So I improved it, presenting the 10-cannon flow! After 5 turns of attack, the new cannonballs grow back just in time. Currently, the layout includes 2 sunflowers and 2 money rocks; if the sun points are less than 6000, replace the money rocks with sunflowers, after at most 2 rounds, the sun points will quickly reach 9999 again!