BEIJING – ByteDance co-founder Zhang Yiming surpassed Indian billionaire Mukesh Ambani to become Asia’s second-richest person after a rise in the Chinese technology giant’s valuation and further progress in its AI ambitions.Zhang’s net worth climbed to US$92.8 billion (S$118.7 billion), cementing his position as China’s richest person, according to the Bloomberg Billionaires Index.Zhang’s fortune has swelled more than sevenfold since Bloomberg began tracking his wealth in March 2019, when he was worth US$13 billion.The surge comes amid the success of ByteDance’s video app TikTok, as well as its Doubao AI chatbot, which has amassed more than 300 million monthly users…