[3] However he was chosen by DAP to contest the Kota Melaka parliamentary seat in the 2008 general election but he won by beating predecessor Wong Nai Chee of Malaysian Chinese Association (MCA) with a majority 11,390 vote and retained it again in the 2013 general election by beating Yee Kok Wah of MCA with a majority 20,746 vote.
[4] But only two days later on 22 April he announced his withdrawal as the state seat of Kota Laksamana Independent candidate to fully back the DAP candidate, Lai Keun Ban, instead and to focus to continue defend the Kota Melaka parliamentary seat under the DAP.
[7] On 17 September 2015, a doctor from Malacca who is also the Bukit Palah DAP branch chairman, Dr Wong Fort Pin, successfully sued Sim and Goh for defamation and won RM300,000 in damages.
[9] On 12 February 2017, Sim, along with three other DAP Malacca state assemblymen namely Goh (Duyong), Lim Jack Wong (Bachang) and Chin Choong Seong (Kesidang) announced their resignation from the party to be Independent, citing lack of trust in DAP leadership.
[12] In the GE14, Sim officially contested first time as independent candidate for the state seat of Kota Laksamana but lost.