Saving for the lazy, that is, all side missions (for gold) have been completed before the start of the storyline (the first mission has been completed, which would be saved), which can only be completed at this stage, in more detail what has been completed and what else needs to be done for 100% (not counting plots) is written in a text file in the archive.
Grand Theft Auto: Chinatown Wars: Save Game [Start Game] (35.18%) [PSP] Free Download
Save only for the American version of the game (and the Russian, which is also based on it)
The same goes for the PSP emulator (PPSSPP)
Installation instructions in the archive