I’d like to find the letter of Quin Shi Huang-Di addressed to his son

Hello. Could you help me – I’d like to find the letter of Quin Shi Huang-Di addressed to his son Fu Su, in which he said that Fu Su should be emperor.

In addition to this information, I need to find any evidence of its existence. I hope to find fragments of the original letter (in fotos, pictures, enggravings etc).