The steps of pinching npc's face in the Sims game are as follows:

1. Players need to click on the npc (Sims) whose appearance is to be modified on the homepage management page of the game to open the "Edit Items" interface.

2. In this interface, click the "More" option in the lower left corner, and then select the "Face Editing" option in "Character Editing".

3. In the pop-up "Face Editing" window, players can modify and adjust the five senses of npc through the following options.

4. After the modification, click the "Save" button in the upper right corner to complete the appearance modification.