Although the use of other Chinese varieties among the Singapore population has dwindled, they continue to be used in election rallies as of the 2011 parliamentary election. For instance, both Low Thia Khiang and Chan Chun Sing were noted for their usage of different Chinese varieties during election rallies. There has been a continuous debate between the general Singaporean population and the Government with regard to the status of Singlish in local domains. While the government fears that the prevalence of Singlish would affect Singapore's overall image as a world class financial and business hub, most Singaporeans on the other hand have chosen to embrace Singlish as an identity marker and as a language of solidarity. In an attempt to eradicate the usage of Singlish, the government then began the Speak Good English Movement, encouraging people to use Standard Singaporean English in all contexts instead. Despite the success of the campaign, most Singaporeans surveyed still preferred the use of Singlish to communicate with fellow Singaporeans, and they also believed that they had the ability to code switch between Singlish and Standard Singaporean English, depending on the requirements of the particular situation. Most recently, Singlish came into the limelight when Republic of Singapore Air Force pilots supposedly used the language to much effect to prevent their American counterparts from intercepting their communications during the 2014 Red Flag exercise, resulting in a boost in support for the usefulness of Singlish among Singaporean netizens. Chinese varieties (classified as dialects by the Singapore government), with the exception of Mandarin, have been in steep decline since the independence of Singapore in 1965. This is in part due to the Speak Mandarin Campaign that was launched in 1979. As part of the campaign, all programmes on TV and radio using non-standard varieties were stopped. Speeches in Hokkien by the prime minister were discontinued to prevent giving conflicting signals to the people. By the late 1980s, Mandarin managed to some extent, to replace these varieties as the preferred language for communication in public places, such as restaurants and public transport. The preservation of local varieties in Singapore has been of increasing concern in Singapore since the 2000s, especially among the younger generation of Chinese youths. This sudden revival of other varieties can mainly be attributed to a feeling of disconnection between the younger and the elder generations, as well as a sense of loss of identity from their own linguistic roots for many others. While more work has to be put in to revive these varieties, the recent 2014 Singapore Teochew Festival held in Ngee Ann City can be regarded as a positive sign that more people are becoming more actively involved in reconnecting with their linguistic roots.