1万 is the Chinese way of saying 10,000. In English, we would say "ten thousand." The number comes from the combination of the Chinese characters 一 (yī, meaning "one") and 万 (wàn, meaning "ten thousand").

Here are some examples of how you could use this number in English sentences:

The population of the city is over 10,000 people.

The company made a profit of $10,000 this quarter.

The movie grossed over $10,000 in its opening weekend.

In Chinese, these sentences could be translated as:

这个城市的人口超过1万人。

这家公司本季度盈利1万美元。

这部电影在首映周末票房超过1万美元。