In 2006, Lui's undercover reporting exposed child sex slavery in Indonesia. Later, in a CNN Freedom Project report, he investigated seven-year-olds sold to Ghanaian fishermen as labor slaves. His field reporting explored political and civil rights controversies in the Asian-American community, including the 1882 Chinese Exclusion Act, which led to a system of illegal immigrants called paper sons. He reported on the racially motivated killing of Vincent Chin and its association to the Muslim-American community's post &lt;a href="September%2011%20attacks"&gt;9/11&lt;/a&gt; challenges. In addition, he reported extensively from the Gulf on the BP oil spill. He received Peabody and Emmy awards for his team reporting at CNN during Hurricane Katrina and the Gulf Oil Spill.