No more loan rangers? Beijing's waning support for private credit scores

* Central bank changes tack on personal credit rating - sources

* PBOC says none of 8 tech firms meets license criteria - sources

* Many younger Chinese now spending on credit

* Consumer borrowing about $4 trln in May

* Talks may end with deal for limited data sharing - sources

By Cate Cadell and Shu Zhang

BEIJING, July 4 (Reuters) - A drive by China's big technology companies to develop credit scoring platforms, originally backed by Beijing, faces growing opposition from regulators, who fear the initiatives may threaten data security and create conflicts of interest.

Two people familiar with the process told Reuters that the central bank - which in 2015 allowed eight firms including Alibaba's Ant Financial and Tencent Holdings to develop scoring systems - has quietly pulled back its support.

The People's Bank of China has shelved plans to turn that initial approval into official licenses, the people said, raising questions over what services the firms can offer and their ability to build fully-fledged credit bureaus.

The impasse also underlines how China's tech companies with banking ambitions struggle with unpredictable regulation as Beijing weighs the pros and cons of private sector involvement, when it needs to both encourage consumption and control economic risk.

"Clearly there's a conflict of interest and that's something the PBOC has realised," said one of the people, adding the bank felt none of the eight firms was entirely suitable. "They're not going to stand up and publicly admit they made a mistake; the only power they have is to basically not grant the licenses, which is what they've done."

Unlike leading international peers that only operate credit scoring systems, these Chinese firms have existing businesses in commerce and finance, raising questions about their impartiality, the people said.

The two people - one with direct knowledge of the scheme and a central bank official - asked not to be named as they were not authorised to talk publicly about the plans.

The PBOC did not respond to requests for comment.

Yet, in a closed-door seminar in April, Wan Cunzhi, head of the PBOC's Credit Information System Bureau, said there was currently a "major conflict of interest" - potentially the first acknowledgement of concern outside internal circles.

"Their corporate governance structures don't have third party credit independence," he said, referring to the eight companies, according to a transcript of the speech seen by Reuters and confirmed by a person who attended the seminar.

"It's not possible under these circumstances to give out licenses unless they can meet the standards."