Shù wān gōu is your first combined stroke that brings together three strokes: A vertical shù, a smooth wān curve to the left, and a final gōu flourish upward. You shouldn't find this stroke too difficult to manage with just a few practice attempts.

One of the simplest and most ubiquitous characters in Chinese includes the shù wān gōu stroke:

Before moving on, I should mention that when speaking about somebody's son, Chinese people usually combine 儿 with 子 to form the word 儿子 (literally "son child," pronounced ér zǐ in Mandarin).

Adding two héng strokes to 儿 allows you to draw this indispensable Chinese character:

Once you know how to draw 元, adding just a few more strokes produces this character:

Note that in this case, as with other characters that include a surrounding box, the first two strokes are shù + héng zhé, followed a smaller version of 元, and completed by the final héng stroke at the bottom. The two words 元 and 园 are homophones, with precisely the same pronunciation. Yet in practice, you're unlikely to confuse them because their meanings are so distinct.

Here's another common Chinese character that includes shù wān gōu:

And here's another that shows up in a wide variety of common words for all sorts of modern conveniences:

This character is the simplified form of a much more complicated character that originally depicted thunder, in the form of rain falling on a field, being captured and harnessed by means of a wire. As you can see, in its current form, all that remains is the field (田) and the wire.

Here's a character that provides a good practical comparison of the tí and piě strokes:

Examine this character closely and you'll see how it's constructed: A long shù stroke and then a short héng stroke are both drawn before the tí stroke is drawn upward from left to right, completing the left side of the character. Next, the piě stroke is added downward from right to left, and then finally the shù wān gōu is drawn.

To finish up, here’s a word that Mandarin speakers use at the end of a sentence to express or verify that they’ve understood something correctly: