Congress general secretary in-charge communications Jairam Ramesh said that in the 'Hum Adani ke Hain Kaun (HAHK)' series under which the Congress posed questions to Prime Minister Narendra Modi, the party had asked him about his 'favourite business group's links with the Chinese citizen Chang Chung-Ling (aka Lingo Chang) who has been a director in several Adani Group companies along with Vinod Adani and also made an appearance in the Panama Papers'.