China has reportedly commissioned a "preliminary research study" to build an international rail link connecting its border province of Xinjiang to Pakistan, a contentious project from India's perspective as it runs through Pakistan-occupied Kashmir.

China has allocated funds for preliminary research on building an international railway connecting its westernmost city of Kashgar in Xinjiang with Pakistan's deep-sea Gwadar Port on the Arabian Sea, state-run China Daily quoted the director of Xinjiang's regional development and reform commission, Zhang Chunlin as saying today.

"The 1,800-km China-Pakistan railway is planned to also pass through Pakistan's capital of Islamabad and Karachi," Zhang said at the two-day International Seminar on the Silk Road Economic Belt being held in Urumqi, Xinjiang's capital.