doc: update readme

Author: felicityin

README.md

@@ -5,11 +5,13 @@
 zkvm-brainfuck is a ZK-VM for the Brainfuck language, built on [Plonky3](https://github.com/Plonky3/Plonky3).
 
 - Designed as a register machine instead of a stack machine with RAM.
-- Compared to SP1, this system employs a single shard and produces only core proofs.
+- Compared to SP1, this system employs a single shard and produces only one core proof.
 - Lookup serves two key purposes:
    - Cross-Chip Communication - The chip needs to send the logic which itself cannot verify to other chips for verification.
    - Consistency of memory access (the data read by the memory is the data written before) - Proving that the read and write data are “permuted”.
 
+[Chinese doc](https://aping-dev.com/index.php/category/zkVM/).
+
 # Usage
 
 ```rust