Burning the bootloader on a Chinese Nano

Thanks for your valuable help anyways !!!

Hey, i know this may be late but i had same problem, try this if it's not too late:
in arduino IDE goto: Tools->Processor and choose ATmega328P (Old BootLoader).
That worked to me, no need to reflash it.
Now you can upload any sketch.

Le croquis utilise 10286 octets (71%) de l'espace de stockage de programmes. Le maximum est de 14336 octets.
Les variables globales utilisent 241 octets (23%) de mémoire dynamique, ce qui laisse 783 octets pour les variables locales. Le maximum est de 1024 octets.

You filled the RAM to the limit. Are you sure that's Blink?

Phoenixset:
Hey, i know this may be late but i had same problem, try this if it's not too late:
in arduino IDE goto: Tools->Processor and choose ATmega328P (Old BootLoader).
That worked to me, no need to reflash it.
Now you can upload any sketch.

In 2017 when this thread started, the 'old bootloader' option did not exist; only came in the beginning of 2018 with board manager 1.6.21.