From 2008 to 2010, he served as a Legation Counselor, Deputy Director-General of the Department of International Organizations and Conferences, and led the Chinese delegation to sessions of the Asia-Pacific Economic Community.

Since 2015, he has been Director-General of the Information Division, a post which includes the function of Speaker of the Ministry of Foreign Affairs of the People's Republic of China.

Lu was very critical of the THAAD defense system that was introduced to South Korea by the United States to defend it against possible nuclear attack from DPRK, citing a "direct harm [of] the strategic security interests [for] China and Russia".

[3] Regarding Syrian Civil War, Lu commented that he supports Geneva peace talks and blasted China-India Line of Actual Control crossing as media hype.

[3] In 2017, he stated that the Sino-British Joint Declaration "no longer had any practical significance" with regards to the governance of Hong Kong, a view that was disputed by the British Foreign Office.