Dato Sri Tiong King Sing (simplified Chinese: 张庆信; traditional Chinese: 張慶信; pinyin: Zhāng Qìngxìn; Pe̍h-ōe-jī: Tiong Khìng-Sìn; born 3 September 1961) is a Malaysian politician who has served as Special Envoy of the Prime Minister to China in the Perikatan Nasional (PN) administration under Prime Minister Muhyiddin Yassin since April 2020 and the Member of Parliament (MP) for Bintulu since November 1999. He served as Special Envoy of the Prime Minister in the Barisan Nasional (BN) administration under former Prime Minister Najib Razak from January 2014 to the collapse of the BN administration in May 2018. He is a member and President of the Progressive Democratic Party (PDP), a component party of the Gabungan Parti Sarawak (GPS) coalition which is aligned with the ruling PN coalition and formerly the BN coalition. In accordance with its expansion to West Malaysia in 2017, the party was rebranded with its new name and logo from the Sarawak Progressive Democratic Party (SPDP), a former component party of the BN coalition. Following the collapse of the BN administration after the 2018 general election and in the aftermath, a meeting between all Sarawak-based BN component parties was held on 12 June 2018, PDP decided to leave the coalition with the other three parties to form a new Sarawak-based political coalition in the meeting, namely the GPS coalition.