I kept hitting the black dress because the Life Ring can be sold for 7000 bucks, and when you have money, buy a weapon with 100% split! For defending against monsters, although you might see good waves of monsters like the 5th wave where Lü Bu has high defense, still pay attention to safety. After finishing the defense, go fight skeletons, you can kill levels 1, 2, and 3. Bring around 30 potions! Burst out Swift Wind Rings and Fusion Stones, press ESC to bring up your storage to place items! Then there's something next to the witch near the base that costs 20k to buy, used for combining items! I made the shield first, which is both offensive and defensive! Then start brushing wood for combination, and "Nine Swords of Solitude"! By that time, Lü Bu is basically invincible, just standing above the base to defend against monsters. Then keep brushing for money and buying books, buy life books when you have money! Because the 20th wave is absolutely crazy, if your blood isn't over 100k, it's simply not enough time to drink blood potions or buy a beast scroll that doubles attack! You can also choose to brush the level 1 skeleton's book! As for that magic ring, since it's single-player mode, there won't be enough time to combine! Finally, your attack will be around 20k-30k, and defense around 800, which should be enough to pass the game! Then go kill bosses, they are easy to kill! Lü Bu is relatively harder to beat... after that, you've passed the game!