How do you spell the pinyin of um?

The composition of returning home is written like this:

1, lamenting the beauty of hometown.

2. Describe the scenery in detail, and describe flowers, trees, etc.

3. Describe the actions and feelings of meeting relatives, which can be mixed with dialogue and enrich the article.

4. Describe the content of playing with relatives in detail.

5. Summarize the full text.