Lu said Beijing wants to resume the multi-party negotiations that ended in stalemate in 2009 and suggested that USA plans to deploy a missile defense system in South Korea were damaging its relations with China.
It appears Trump and other USA leaders are hoping China, long a patron of North Korea, will put pressure on dictator Kim Jong Un to back away from his military buildup.
South Korea's acting president, Hwang Kyo-ahn, said in a cabinet meeting on Tuesday that they would strengthen their alliance with the USA and work with China in keeping North Korea in check.
The North Korean Vice Foreign Minister has blamed US President Trump for his bullish tweets.
He said the Trump administration's deployment of the Carl Vinson nuclear carrier task group to waters off the Korean Peninsula again "proves the U.S. reckless moves for invading the DPRK have reached a serious phase of its scenario".
"If the USA is reckless enough to use military means it would mean from that very day, an all out war". At the same time, the vice president did not rule out the possibilities of negotiating with North Korea "through peaceable means".
"Today we are beginning a process of economic dialog", he said in Tokyo.
Meanwhile, Pence reassured Japanese Prime Minister Shonzo Abe that the United States' support for Japan is 100% amid the increasing provocations from North Korea.
As fears grow that it may also be preparing for its sixth nuclear weapons test, vice foreign minister Han Song-ryol said that its programme would only escalate.
Kim stressed that U.S.
Pence told reporters that Trump was hopeful China would use its "extraordinary levers" to pressure the North to abandon its weapons program, a day after the North's failed missile test launch.
"It shows why we are working so closely right now with the Chinese.to try to get this under control and aim for the denuclearised Korean peninsula", he said.
In a visit to Seoul, South Korea, on April 17, Vice President Mike Pence warned North Korea not to test the U.S. Mentioning the U.S.'s recent attacks in Syria and Afghanistan, Pence said, "North Korea would do well not to test his resolve or the strength of the armed forces of the United States in this region".
American officials said the missile test-fired on Sunday exploded seconds after launch. When asked about his next move, he said, "You'll see". North Korea's goal appears to be to impress the world with its nuclear prowess and pressure Washington into direct talks.
The failed North Korean missile test over the weekend was an attempt by the reclusive country to "provoke something", US Defense Secretary Jim Mattis told reporters on his way to the Middle East. Our nuclear weapons protect us from that threat. Cha noted Pence's reference to "strategic patience", an Obama administration strategy in which diplomatic and economic pressure from sanctions were given time to change the North's behavior.
When Chinese President Xi Jinping met Trump in Florida earlier in April, Xi told him Beijing was ready to cooperate on denuclearizing the Korean Peninsula.