China steps up screening as virus reaches 400

The video tutorial begins with a brief introduction and initial instructions, setting the stage for the content to follow.

What is the main purpose of the introduction in the video?

• To present a challenge to the viewer

• To summarize the entire video

• To provide a detailed explanation of the topic

• To encourage the viewer to continue

What does the speaker convey with the word 'Yeah'?

• Agreement

• Disagreement

• Confusion

• Indifference