How to get joy elimination happy holiday caravan

Is the questioner asking how to get the Joyful Elimination Happy Holiday Valve? The steps are as follows.

1, get the cart base, through the completion of the game's various mission rewards, get the level 1 cart base.

2. Synthesize cart bases Repeat the first step to get two level 1 cart bases, and synthesize two level 1 cart bases into a level 2 cart base.

3.Synthesize cartsRepeat the first step to get two level 2 cart bases, and synthesize two level 2 cart bases into a level 3 cart.

4. Repeat the first, second and third steps to get two level 2 trolleys and synthesize two level 3 trolleys into trolley props with boxes, and finally click on the trolley props with boxes to get the valve props.