As debate continues over calls to update China's inheritance rules, experts say the digital age has produced another puzzle to solve: the growing amount of "virtual worth" people are now leaving behind.

China has witnessed a boom in Internet use in the last decade, with the number of users reaching roughly 400 million. Many have e-mail accounts, use instant messaging and social media, and play online games.

However, the question of who can gain access to the information stored on these accounts - so-called e-property - after a user has died is causing headaches for relatives, companies and authorities.