How to set exposure for Huawei's mobile phone photography?

Take Huawei Glory V8 mobile phone, system version: EMUI8.0.0 as an example, and take long exposure photos with reference to the following steps:

1. First click the camera icon to enter the camera.

2. Then slide the screen to the right.

3. Then click Streamer Shutter.

4. Then click More.

5. Then choose the scene to shoot.

6. Then click the shutter to stop shooting at the right time.