iiMedia

The provided news articles focus on Baidu and PDD Holdings, not "iiMedia". Baidu is a Chinese tech giant launching an AI-driven Wikipedia challenger and merging app businesses to boost its consumer AI presence. PDD Holdings, a US-listed e-commerce firm, was fined for tax violations by Shanghai authorities. Since "iiMedia" is not mentioned, I cannot provide a summary about it based on these articles. I can only summarize the information provided about Baidu and PDD Holdings.