"China is strongly dissatisfied with the visit to the disputed region by the Indian leader disregarding China'sserious concerns," Ma said in a statement posted on the ministry's website.
He noted that China and India had "never officially settled" demarcation of their border, and China's stance onthe eastern section of the China-India border was "consistent and clear-cut".
Singh had toured and addressed an election rally in Arunachal Pradesh on October 3.
Recently, China had blocked part of a loan to India from the Asian Development Bank (ADB) for developmental projects inArunachal Pradesh. China also protested a visit to the state last month by exiled Tibetan leader the Dalai Lama.
India says China is illegally occupying 43,180 sq kms of Jammu and Kashmir. On the other hand, China accuses Indiaof possessing some 90,000 sq km of Chinese territory, mostly in Arunachal Pradesh.