Adds analyst comments in paragraphs 7-8

BEIJING/HONG KONG, Aug 8 (Reuters) - Bao Fan, star dealmaker and founder of boutique investment bank China Renaissance Holdings 1911.HK, has been released more than two years after being detained by Chinese authorities, according to a person with knowledge of the matter.

China Renaissance sent shockwaves through the country's financial sector in 2023 when it announced it was unable to contact Bao, who founded the bank in 2005 with two other men and still owns nearly 49% of the company's issued shares.

He was one of the several high-profile executives in China - mostly from the finance industry - who went missing in recent years with little explanation amid a sweeping anti-corruption campaign spearheaded by President Xi Jinping.

His disappearance rattled professionals in the financial industry in the world's second-largest economy, as Beijing pressed its campaign to rein in the "lavish lifestyle" of the "financial elite".

His release comes as Beijing seeks to boost business confidence, particularly among the country's tech entrepreneurs, whose businesses have suffered from a years-long crackdown.

China is looking to boost confidence in the private sector, which has been reeling from weak domestic consumption and a prolonged debt crisis in the property sector, against a broader backdrop of heightened trade tensions with the United States.

"This is certainly a positive signal, as Bao was the most high-profile financier detained in recent years," said Christopher Beddor, deputy China research director of Gavekal Dragonomics.

"Still, it won't change the fact that the anti-corruption campaign continues to churn through the financial sector, and the common prosperity campaign has led to sweeping pay caps and even clawbacks," said Beddor. "China's financial sector remains a long way from its heyday only a few years ago."

HIGH-PROFILE DEALS

Bao, widely regarded as one of China's best-connected bankers, was released from detention earlier this week, the person said on Friday, declining to be identified because the information was not public.

He had been involved in high-profile deals including the mergers of ride-hailing firms Didi and Kuaidi, food delivery giants Meituan and Dianping, and travel platforms Ctrip and Qunar.

Neither China Renaissance nor Bao responded immediately to Reuters' requests for comment. Chinese media Caixin first reported Bao's release, citing unidentified sources.

China Renaissance's shares jumped 17% on Friday to close at HK$6.87 ($0.8752) before the news of his release became public.

Bao, who previously worked at Credit Suisse and Morgan Stanley, went missing in February 2023.

Trade in China Renaissance shares was suspended in April 2023 after the bank delayed publication of its audited annual results as a result of mainland Chinese authorities detaining Bao as part of an investigation.

A Chinese financial publication reported in May 2023 he was detained by disciplinary and supervision officials. Authorities have as yet not given any explanation. China Renaissance shares plunged 72% on the day it resumed trading in last September.

Sources have previously told Reuters that he was taken away to assist in an investigation into a former colleague.

Xie Yi Jing, who co-founded China Renaissance, replaced Bao as chairman in February last year.

Subsequently, Bao's wife Hui Yin Ching was appointed as chairperson to lead the boutique investment bank in October, with changes in other senior management ranks as well.

(Reporting by Beijing and Hong Kong Newsroom; Editing by Sumeet Chatterjee, Kim Coghill and Gareth Jones)

((yukun.zhang@thomsonreuters.com;))