Welcome to Sino Defence Major
Unfortunately; as others have already said, there is no concise, definitive source that will help you understand China's current geopolitical objectives and the strategies it is/will employ to achieve them. What you need to do is to spend a long time, learning to understand how the Chinese State sees the world from its perspective and learn how to interpret the very subtle code, through which it dispenses the occasional clue as to its intentions.
It is though fair to say that many of its ultimate objectives are not substantially different to those of many of its past eras, the only obvious difference is the precise means and capabilities; relevant to the reality of the modern age, through which it can realise them.
If I were to point you in a specific direction, the it would be that China primarily seeks to establish a secure and stable international environment, favourable to its own development and continued gain in wealth. China is seeking to achieve this today; just as it did in the past, by establishing and controlling/maintaining trans Eurasian land trade routes.
Much of the work relating to re-establishing these routes are undertaken on a collective regional basis, through the offices of the Shanghai Co-operation Organisation, so certainly you should follow activities through that organisation.
Most of the current work relates to the building of trans continental infrastructure projects - Oil and Gas Pipelines, Super Highways, Railways, Power and Water. You can follow progress through regular review of the Chinese Media.
Good luck, but do not expect to see any big picture in any short time frame.