YZi Labs has spearheaded a $25.5 million strategic funding round for blockchain infrastructure company Sign, with IDG Capital also participating. Sign's CEO, Xin Yan, announced that the investment will be directed towards expanding the company's technical team and enhancing partnerships to further develop sovereign blockchain infrastructure. This latest funding round brings Sign's total capital raised to over $55 million, following previous investments including a $16 million round led by YZi Labs in January.