Chang Xiaobing, 58, was CPC chief at China Unicom before assuming his post at China Telecom in August this year in a major reshuffle to revamp the country's three telecom networks which had a massive subscriber base figuring among the top of telecom firms of the world.
"Chang is being investigated for suspected for "severe disciplinary violations," CPC Central Commission for Discipline Inspection (CCDI) announced today.
Chang is one of the hundreds of officials who faced anti-graft probes commissioned by CPC after Xi came to power in 2013.
The drive has since expanded, with Xi warning that prevalent corruption threatens the one-party rule.
The CPC is the sole governing party of China since the country was formed in 1949.