different identification numbers. For example, 521/522 (normal coupling) or 521/540 (cross-coupling). Kawasaki and CSR Qingdao Sifang built sets 501–570. Operational problems On 5 July 2016, a Hong Kong-based non-profit news organization FactWire had broken the news of the C151A trains suffering from multiple defects relating to Chinese-made materials and posted the entire investigative works in YouTube. Factwire allegations These are the list of allegations mentioned in their YouTube video since C151A entered into revenue service in 2011 (27 May 2011). This list compiles the initial response from the authorities are compiled from the first SMRT press release on 5 July 2016, 4:30pm (GMT+8) by SMRT Trains managing director Lee Ling Wee as well as the first Land Transport Authority press release at an hour after first SMRT's press release. and also the subsequent official position on Singapore government's online FAQ portal 'Factually' which quotes sources from the Facebook page of Land Transport Authority hours after the initial press release. Reactions This incident was a source of public concern among Hong Kongers because subway operator MTR had ordered fleets of a new train from the same manufacturer CSR Sifang. The news was quickly reported in other Hong Kong media. The incident also created a public uproar in Singapore, generating a public reaction. Some of these discussions included criticism of the Land Transport Authority (LTA) and SMRT for the cover-up about the defective trains, while others questioned the quality of the Chinese-made trains. The LTA released more technical details on 6 July 2016 claiming that 5 of the 26 defective trains had been rectified, including photos illustrating the 'hair-line crack'. The authority also named an independent third-party assessor, TUV Rheinland who shared the same opinion that the defects are "not safety-critical". During the same period, a rumour posted on 4 February 2015 alleging misconduct of CSR Sifang faking technical data involving almost 70 people from multiple departments since November 2010 for failing to meet the standards set by Kawasaki Heavy Industries gained traction amongst the public. The consortium refuted the rumor on 7 July 2016 and threatened to take legal actions. The LTA also publicly dismissed the allegations in a press statement. The link to the original rumor was deleted soon after the response from the authorities. On 7 July 2016, the LTA also stated that "no brackets were added at any time to the underframe" in order to refute a subsequent