1, unknown change: each map has its own unique world boss, the refresh time is not fixed, and the location remains unchanged. It will be notified six minutes before each refresh. No matter what copy you brush (except Nancy and the university), you must first put down your task and rush to the target map. Every time I called, it was basically a dozen or twenty people, and I couldn't even drink soup when I was late. The world boss polymer is also obtained randomly, and only given once a day. If you miss it, it is recommended to change the wire brush.

2. Special treasure chest: Each map has a scattered special treasure chest. For example, there are many castles in the heavily polluted area of Shashibao and the center of the map. This treasure chest is guarded by piles of zombies or mercenaries. If you can't beat it, you can go to a place to attract fire and secretly open the box. Note that wooden cases can be opened in general. Ordinary blue treasure boxes are all resources.

3, treasure map: this must first meet a random npc, what is the name is not clear, anyway, as long as you meet a map npc, go over and talk, and then give a map treasure map, the polymer is also random.

4. Treasure chest in Xiaer Town: There are treasure chests under the account books of Xiaer Town Nuclear Power Station, but all nuclear power stations are guarded by mercenaries. It is not recommended to wait for the bus at the roadside and then get off, avoid the soldiers and then go upstairs (it takes two people to get upstairs). After diving and opening the treasure chest, it is not impossible to go out. Just report that you are stuck and run away from home.

5. Arcade Street: The discounted goods in Arcade Street occasionally have polymer coatings. If you have it, don't hesitate to buy it. This is nothing special.

6. Caravan market: You can get some points when you complete the caravan training task, and the points can be exchanged with Little Sun.

7. Quartermaster box in the camp: the camp will be cool in summer and winter, and then there will be a quartermaster box exchange. The price is 2000 camp contribution value, which can be obtained by patrolling and donating food. Polymers are also obtained randomly, except for arcades and markets, and everything else depends entirely on luck.