HONG KONG/SHANGHAI, Aug 19 (Reuters) - Embattled Chinese property developer Evergrande Group (3333.HK) is in talks with smartphone maker Xiaomi (1810.HK) and Shenzhen state-backed investment firms as it looks to sell part of a 65% stake in its electric vehicle (EV) unit, three sources said. The Evergrande New Energy Vehicle (NEV) Group (0708.HK) had a market capitalisation of $12.5 billion on Thursday and one of the sources said the consortium is looking to buy a significant minority stake. Evergrande, Xiaomi and Shenzhen"s state asset regulator did not respond to requests for comment. The talks were said by the sources to be at an early stage and subject to changes. The developer said last week that it was in discussions with several independent third-party investors on the proposed sale of certain assets, including stakes in Evergrande NEV, as part of its efforts to reduce its debt. Smartphone maker Xiaomi has been ramping up investments in EV suppliers after it unveiled its EV ambition with an investment of $10 billion in March, following its peers from Apple Inc (AAPL.O) to Huawei Technologies Co (HWT.UL) as they bet on more cars becoming battery-powered and smart. read more The potential deal would give Xiaomi EV production facilities to push forward its auto business, the sources said. DEBT WARNING Evergrande has been struggling to raise funds to pay its debts after Beijing stepped up curbs on the real estate sector to contain the risks of a bubble. China"s central bank, banking and insurance regulator said they had summoned executives of Evergrande to a meeting on Thursday and issued a rare warning that the company ought to reduce its debt risks and prioritise stability. read more Investors have been worried about Evergrande"s financial health and the potential systemic financial risk it poses. Concerns about Evergrande intensified after it failed in June to pay some commercial paper on time. A Chinese court froze a $20 million bank deposit held by the firm on the request of China Guangfa Bank last month. In May, the developer put a 2.66% stake in Evergrande NEV on sale at a 20% discount to raise about HK$10.6 billion ($1.36 billion). Evergrande NEV warned of a 4.8 billion yuan ($739.67 million) net loss for the first half of 2021, according to its filing with the Hong Kong Stock Exchange, nearly double the loss a year ago. The company unveiled nine EV models under the brand Hengchi at the Shanghai Auto Show earlier this year, vowing to start mass production and delivery from next year. It has built three manufacturing bases located in Guangzhou, Shanghai and Tianjin, and acquired a production permit for electric passenger vehicles by taking the controlling stake in NEVS AB in 2019. Sales of new energy vehicles, including pure battery electric vehicles as well as plug-in hybrid and hydrogen fuel cell vehicles, are expected to make up 20% of China"s overall annual auto sales by 2025. ($1 = 7.7911 Hong Kong dollars) ($1 = 6.4894 Chinese yuan renminbi) Reporting by Julie Zhu in Hong Kong and Zhang Yan in Shanghai; Additional reporting by Clare Jim; Editing by Sumeet Chatterjee and Elaine Hardcastle Our Standards: The Thomson Reuters Trust Principles.