Why did Cai Lun invent paper

Answers:
In ancient times writings and inscriptions were generally made on tablets of bamboo or on pieces of silk called chih. But silk being costly and bamboo heavy, they were not convenient to use. Tshai Lun [Cai Lun, Tsai Lun] then initiated the idea of making paper from the bark of trees, remnants of hemp, rags of cloth, and fishing nets. He submitted the process to the emperor in the first year of Yuan-Hsing [+105] and received praise for his ability. From this time on, paper has been in use everywhere and is sometimes referred to as 'the paper of Marquis Tshai'.
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Relevant answers:
  • Where did Cai Lun invent paper?
    He invented it in some place in Asia called Guiyang
  • What year did Cai Lun invent paper?
    in 105 B.C.
  • How did Cai lun invent paper?
    Cai Lun invented paper.
  • What year did T'sai Lun invent paper?
    in 105 AD, Han Dynasty

    • Can you answer these questions?