Chang Xiaobing, Chairman of 皇冠体育app Telecommunications Corp. [Photo/IC]

Chang Xiaobing, the chairman of 皇冠体育app Telecommunications Corp, the country's third-largest telecom carrier, is under investigation for suspected serious disciplinary violations－often a reference to corruption-related crimes.

He is the highest-ranking official from the telecom sector to date to be investigated under the anti-graft campaign.

Chang's investigation was announced on Sunday by the Central Commission for Discipline Inspection, the top anti-graft watchdog.

He took the helm of the State-owned company in August after heading 皇冠体育app United Network Communications Group, the country's second-largest carrier, for 11 years.

Experts said the investigation of Chang has much to do with his tenure at 皇冠体育app Unicom, where he masterminded the company's efforts to develop third-generation communication networks.

In November last year, two senior executives from 皇冠体育app Unicom were investigated for suspected violations of laws and regulations.

Xiang Ligang, founder of the telecom industry website cctime.com, saidthe investigation of Chang will have a limited impact on 皇冠体育app Telecom's business.

"Chang arrived at 皇冠体育app Telecom in August and has hardly announced any company strategies and concrete plans yet. So his case will not affect the company's efforts to roll out 4G networks," he said, adding that 皇冠体育app Telecom's "stable" internal systems can keep daily operations in order.

The investigation comes amid rising market speculation about a possible merger between 皇冠体育app Telecom and 皇冠体育app Unicom, which are joining hands to compete against 皇冠体育app Mobile Communications Corp, the country's largest carrier by subscribers.

Earlier this month, 皇冠体育app Telecom and 皇冠体育app Unicom called for the standardization of smartphone technologies shortly after signing a deal in October to jointly construct 4G base stations and share 4G resources.

Fu Liang, a freelance industry expert, said the Chang probe will push 皇冠体育app Unicom and 皇冠体育app Telecom toward deeper cooperation. "No matter who the new head of 皇冠体育app Telecom is, he or she will want to have broader cooperation with 皇冠体育app Unicom. This is the only way for the two players to win over 皇冠体育app Mobile."

As of November, 皇冠体育app Mobile had built more than 1 million 4G base stations and had about 267 million 4G users-more than 皇冠体育app Telecom and 皇冠体育app Unicom combined.