Despite official data showing (that) the unemployment rate was 6 percent in April, up to 10 percent of people officially employed in China could actually be out of work.

1. showing (that) the unemployment rate was 6 percent in April，是现在分词短语，作 data 的定语。我在 showing 后面加上 that 就更清楚了，说明是 showing 的宾语从句。

2. employed in China，是过去分词短语，作 people 的定语。