"China's determination and resolve to safeguard national security and sovereignty is unshakable", Wu said at a news conference to mark the upcoming 90th anniversary of the founding of the People's Liberation Army.
Though the government has not formally commented on the face-off near the Sikkim border, officials told Hindustan Times they were closely watching developments between India and China as Nepal shares a long border with both countries, including a strategic tri-junction.
Tensions between Beijing and Delhi escalated this June when Chinese teams started building a road on the plateau.
Wu said withdrawal of Indian troops was a precondition for any dialogue.
Taking a tough stand on the ongoing stand off between India and China, Beijing on Monday asked Delhi to "immediately" withdraw its troops from the controversial Doklam plateau in Sikkim. Over the period China has squarely blamed India for provocation and called to take practical measures to correct its wrongdoing.
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He said the military deployment and training in Tibet would be stepped up in the face of the dragging stand-off between Indian and Chinese troops at Doklam. "I want to stress again, it is the pre-condition for any meaningful talks between the two sides", Spokesperson of Chinese Foreign Ministry Lu Kang said during a regular press briefing while responding to a question regarding a possibility of resolution of China-India standoff during the BRICS security summit.
"The history of the PLA of past 90 years has proven our resolve to safeguard sovereignty and territorial integrity, and our capability and resolve are indomitable", Wu said.
Nepal's key political parties should adopt a common position on the standoff and call on both sides to maintain restraint, the parliamentarians said.
The issue is likely to be discussed when India's National Security Adviser Ajit Doval visits Beijing on July 27-28 India's special representative for border talks to attend a security forum under BRICS.
This dispute is different in nature from the previous frictions happened at undefined boundaries, he added.
India's army chief warned earlier this month that India's army was capable of fighting "2 1/2 wars" if needed to secure its borders.