US President Donald Trump came into office in January 2017. He faced a series of challenges in the relationship between the US and China. These include the One-China policy, trade and the South China Sea. Plenty of progress has been made to improve ties between the two countries, but the road has been rocky. As the Trump presidency moves into its second year, tensions on the Korean Peninsula will likely remain an issue. Several US media outlets are also reporting that Trump is preparing a series of actions on trade aimed at China. CGTN's Tang Bo has more.

TANG BO BEIJING "In January 2017, Donald Trump, as the US President elect, threatened to revisit the ties with Taiwan as leverage to force Beijing to stop the alleged currency manipulation, saying everything is under negotiation, including one China. But he changed his tone in February during his first phone call with President Xi Jinping by backing one China policy.

In March, Trump took a hard line on the US trade deficit with China before his first meeting with President Xi. But he back-pedalled again when President Xi visited the US in April, saying they had great chemistry. Trump later launched a US probe into the alleged unlawful trade practices of China.

During his state visit to China in November, Trump however softened his tone on trade, saying he doesn't blame China. He said who can blame a country for being able to take advantage of another country for the benefit of its citizens. However, he took a hawkish turn in December accusing China of eroding US interests in his National Security Strategy report.

Many people say the twists and turns in the diplomatic ties between the two countries last year indicate anything but predictable in 2018. But despite Trump's incoherence on foreign policy issues, experts say all the tensions last year are not new, and there are mature dialogue mechanisms between the two sides to cope with the problems in the new year."