The first diplomatic contact with China was made in the 1970s, with full diplomatic relations established in the 1990s. Since then the two countries have been major players in strengthening the ASEAN–China relationship, and has maintained a long-standing and greatly prioritised close relationship partly due to China's growing influence and essentiality in the Asia-Pacific region, specifying that "its common interest with China is far greater than any differences". Furthermore, Singapore has positioned itself as a strong supporter of China's constructive engagement and peaceful development in the region. In addition, China has been Singapore's largest trading partner since 2013, after surpassing Malaysia. Singapore and the United States share a long-standing close relationship, in particular in defence, the economy, health, and education. Singapore has also pushed regional counter-terrorism initiatives, with a strong resolve to deal with terrorists inside its borders. To this end, the country has stepped up co-operation with ASEAN members and China to strengthen regional security and fight terrorism, as well as participating in the organisation's first joint maritime exercise with the latter. It has also given support to the US-led coalition to fight terrorism, with bilateral co-operation in counter-terrorism and counter-proliferation initiatives, and joint military exercises.