Tiong King Sing JP (simplified Chinese: 张庆信; traditional Chinese: 張慶信; pinyin: Zhāng Qìngxìn; Bàng-uâ-cê: Diŏng Kéng-séng; born 3 September 1961) is a Malaysian politician and businessman who has served as Minister of Tourism, Arts and Culture in the Unity Government administration under Prime Minister Anwar Ibrahim since December 2022 and the Special Envoy of the Prime Ministers Muhyiddin Yassin, Ismail Sabri Yaakob and Anwar to China since April 2020, Member of Parliament (MP) for Bintulu since November 1999 and Member of the Sarawak State Legislative Assembly (MLA) for Dudong since December 2021.

He served as Special Envoy of the Prime Ministers Najib Razak and Mahathir Mohamad to East Asia from January 2014 to June 2018.

[9] Tiong was re-elected to Parliament again in 2013 general election, and the following year became the President of the SPDP, replacing William Mawan Ikom, who had resigned from the party.

[18] In 2018, Tiong criticised the highway contractors for creating potholes, causing damage to public utilities, and for not installing sufficient warning signs.

[22] On 21 June 2020, as a result from Tiong's effort in raising funds from private sector and individuals, a polymerase chain reaction (PCR) lab was set up in Bintulu Hospital to conduct tests for COVID-19 without the need to send the samples to Sibu or Kuching for processing.

[23] In July 2020, he also complained the slow response of Malaysian Ministry of Health in supplying personal protective equipment (PPE) to Sarawak during the COVID-19 pandemic in the country.

Tiong made the remark after several opposition MPs lashed out at Barisan Nasional (BN) lawmakers, in particular Azalina Othman Said (Umno-Pengerang) for tabling a motion to suspend Lim Kit Siang (DAP-Gelang Patah).

"Remember, we have to respect the Speaker," Tiong said, adding that he believed opposition MPs would never admit their faults and would instead continue to block the issue from being debated.

[33][34] On 29 June 2023, an online news portal reported on an unnamed minister caused a commotion in the Terminal 1 of the Kuala Lumpur International Airport (KLIA).

[38] Tiong claims that the detained tourist had her phone illegally confiscated and asked to pay several thousand ringgits to be allowed entry into the country.

[40] Tiong denied the allegation that he entered the arrival hall illegally as he have an entry pass valid until 2024, a fact confirmed by the Minister of Transport Anthony Loke.

[41] Tiong also urged the Minister of Home Affairs Saifuddin Nasution Ismail to take actions to eradicate a "culture of corruption" within the Immigration Department.

CUEPACS president Datuk Haji Adnan Mat condemn Tiong's action for violating "national security protocols and disrupted the duties of civil servants".