Adds background in paragraphs 4-5, 9

BEIJING, Jan 23 (Reuters) - China's Fosun International 0656.HK said on Tuesday it planned to sell a 5.60% stake in Portuguese lender Banco Comercial Portugues (BCP) BCP.LS for 235.19 million euros ($256.07 million) to boost its working capital.

The Chinese tourism-to-financials conglomerate said it aimed to sell 846 million BCP shares at 0.278 euros each through a secondary market block trade through its unit Chiado (Luxembourg).

If the deal proceeds, Fosun International's stake in the Portuguese bank will be reduced to 20.03%, according to a filing to the Hong Kong stock exchange.

Fosun International has doubled down on divesting non-core assets in recent years amid investor concerns about its debt pressure.

Last year, it sold a 60% stake in Nanjing Nanggang Iron & Steel for 13.58 billion yuan ($1.89 billion) and exited the stakes in several companies such as steel producer Tianjin Jianlong for a total of 6.7 billion yuan.

Fosun International subsidiary Alpha Yu last year sold an 80% of stake in jewellery certification firm International Gemological Institute to private equity company Blackstone for a consideration of $455.38 million .

BCP, in a separate filing, said Chiado is launching a private placement of shares, with an accelerated bookbuilding process, exclusively targeting qualified institutional investors.

Fosun International said its holding in BCP has already been cut down to 25.63% from 29.95% via share sales totalling 195.65 million euros between Nov. 13 and Jan. 9.

As of June 30, Fosun International's total debt, which took into consideration the debts from its listed subsidiaries, stood at 220.92 billion yuan, down 2.6% from end-2022, Fosun said in September.

($1 = 0.9184 euros)

($1 = 7.1832 Chinese yuan renminbi)

(Reporting by Roxanne Liu and Kane Wu; Editing by Savio D'Souza and Rashmi Aich)

((hongkong.newsroom@thomsonreuters.com; （8610）6627-1277; Reuters Messaging: roxanne.liu@thomsonreuters.com))