This undated file photo shows an outlet of Oppo's 5G smartphones in Changzhou, Jiangsu province. (PROVIDED TO CHINA DAILY)

BEIJING - Mobile phone shipments in China increased 68.1 percent year-on-year to 31.78 million units in January, according to the China Academy of Information and Communications Technology (CAICT).

The 5G mobile phones accounted for the majority of the January shipments, totaling 26.17 million units, marking a 59 percent year-on-year expansion, according to CAICT, a research institution under the Ministry of Industry and Information Technology.

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In January, domestic brands maintained their dominance in China's mobile phone industry, with shipments surging 165.2 percent year on year to 26.24 million units.