万科A：公司第一大股东深铁集团向公司提供不超过16.66亿元借款。

Group 1 - The core point of the article is that Vanke A's largest shareholder, Shenzhen Metro Group, is providing a loan of up to 1.666 billion yuan to the company [1] Group 2 - The loan amount is significant, indicating strong support from the major shareholder [1] - This financial assistance may enhance the company's liquidity and operational flexibility [1]