Pasting a piece of false eyelashes requires the following steps:

1. Preparation tools: You need to prepare a fake eyelash, eyelash glue, and tweezers.

2. Measurement and trimming: Fix a piece of false eyelashes on the eyelids and first measure whether its length is appropriate. If it is too long, use tweezers or small scissors to trim to the appropriate length, remember to start trimming from the outer corner.

3. Apply eyelash glue: Squeeze an appropriate amount of eyelash glue onto the false eyelash strap, apply evenly, wait a few seconds, and let the glue slightly thicken.

4. Pasting false eyelashes: Use tweezers to gently pinch the false eyelashes and align them with your natural eyelash line and place them on the eyelids. Starting from the head of the eye, attach the false eyelash strap tightly to the natural eyelash line and gently press for a few seconds to ensure it adheres firmly to the eyelids.

5. Sorting and adjustment: After pasting, gently sort and adjust the position of the false eyelashes with tweezers to ensure natural fusion with natural eyelashes without any gaps.

6. Make up: Finally, you can use an eyelash curler to curl natural eyelashes and false eyelashes together as needed, and apply eye black to make eyelashes look more natural and thick.

Please ensure to follow safe and hygienic methods when using mascara to prevent the product from entering the eyes.