[3] On 28 February 2021, he left PKR to become an independent again and declared support for the ruling Perikatan Nasional (PN) coalition.

[2][6] Their family has a good long track record with the Iban community in Sarawak, having resided in Jalan Airport, Kapit for a long time and are non-native fluent speakers of the local native Iban language despite being of ethnic unmixed full-blooded Chinese descent (since he is of paternal Teochew and maternal Hokkien ancestry, for Datin Susan Sng was a Hoklo Taiwanese married to Dato' Sng, who was a local-born Chinese of Teochew ancestry).

He had been the PRS deputy secretary general under the presidency of Masing until a leadership tussle between them resulted in the revocation of Sng's party membership for insubordination in 2007.

[7] Sng resigned from all his government appointments in 2013 to assume the position of founding president of the just formed Sarawak Workers Party (SWP) which proclaimed to be BN-friendly too.

[18] He was picked during the PH's rules as chairman of the Malaysian Pepper Board (MPB) under the federal Ministry of Plantation Industries and Commodities from May 2018 to April 2020.

[22] Somehow in February 2021 he eventually quit PKR to revert to be an independent MP but supports the new Prime Minister Muhyiddin Yassin and his led Perikatan Nasional (PN) administration.

[27] During PKR party elections in 2018, Anwar Ibrahim who has secured the presidency uncontested, hesitated to work with his elected deputy president and preferred on having his own line-up at the national level which led to a bitter contest of two divisive camps: Team Azmin Ali against Team Rafizi Ramli whereby Anwar supported the latter in the party polls.

[28] Sng issued a statement on 2 October that he is still the party president and he has not resigned from the position due to the incoming 15th general election.

[32] She is the eldest daughter of Sarawak business magnate cum construction tycoon, the late Tan Sri Dato' Paduka Ting Pek Khiing (known for his timber business and the Bakun Dam project) and his second wife, Tan Sri Datin Paduka Chai Yu Lan.

[7][34] Sng was once touted as Sarawak's richest MP after he declared his and his wife's assets to be around RM11.78 million to the Malaysian Anti-Corruption Commission (MACC) in November 2018.