WELCOME TO PARADIZE: Level 50 Homebase Defense (Testing Mythical Rifle, Lvl 50 weapon) 

To upgrade workshop (to craft better gear) you have to complete the missions given by Lady Tamer. For the traps upgrade, it is missions given by the NPC in your camp (but you have to do the story campaign first then along the story campaign he will give you the mission to upgrade traps).

and then to upgrade your kitchen, it is from the NPC nurse.

just follow the mission marker until you reach the cliff, then you change your zombot equipment to saddle and jump over the bridge by dismounting.

Yeah now i need cold resistance. I use soup in kitchen but cant help more cold resistance

@@TrungNguyen-kw5eq you need to equip your zombot with the heat producing armor. Those drop around the entrance of cold zone.