Secretary of State Rex Tilllerson has arrived in China, the last country during his East Asia tour. The North Korean missile and nuclear program was the focus of talks, BBC reported. 

Meanwhile, President Donald Trump wrote on his tweeter that North Korea is behaving very badly.

“They have been "playing" the United States for years. China has done little to help!” he tweeted.

Tillerson is expected to discuss deployment of THAAD in Korea during talks in Beijing.