India should not take its military's trespass into Chinese territory as a "policy tool" to achieve certain political purposes, Foreign Ministry spokesperson Lu Kang said Tuesday.

Indian border troops crossed into Chinese territory from Sikkim in June. After a month-long stalemate, India has still not withdrawn troops to its own territory.

The trespass of Indian border troops has captured the attention of the international community, Lu said at a regular news briefing.

Some foreign diplomats based in China have said the incident is "shocking" and "difficult to understand," and have sought verification from China, Lu said.

"The essence of the incident is clear. Indian troops crossed the demarcated and mutually recognized border in the Sikkim section," Lu said.

The spokesperson urged India to correctly understand the situation and take measures to withdraw troops to avoid an escalation of tension.