About lotus daemon two

Hi guys,
I have installed lotus in Ubuntu18.04.3 LTS.
I meet problem when I implement lotus command. pls kindly help me!
lotus daemon

2020-02-05T11:28:14.670Z WARN build go-paramfetch@v0.0. 1/paramfetch.go:83 checksum mismatch in param file /var/tmp/fi lecoin-proof-parameters/v20-stacked-proof-of-replication-b46f3a1051 afbb67f70aae7082da95def62eee943662f3e1bf69837fb08aaae4.vk, 786a02f7 42015903c6c6fd852552d272 != c752e070a6b7aa8b79aa661a6b600b55
2020-02-05T11:28:14.668Z WARN build go-paramfetch@v0.0. 1/paramfetch.go:83 checksum mismatch in param file /var/tmp/fi lecoin-proof-parameters/v20-proof-of-spacetime-election-a9eb6d90b89 6a282ec2d3a875c6143e3fcff778f0da1460709e051833651559b.vk, 786a02f74 2015903c6c6fd852552d272 != 0df62745fceac922e3e70847cfc70b52
2020-02-05T11:28:14.668Z WARN build go-paramfetch@v0.0. 1/paramfetch.go:83 checksum mismatch in param file /var/tmp/fi lecoin-proof-parameters/v20-stacked-proof-of-replication-e99a585174 b6a45b254ba4780d72c89ad808c305c6d11711009ade4f39dba8e9.vk, 786a02f7 42015903c6c6fd852552d272 != 20d58a3fae7343481f8298a2dd493dd7


lotus net peers | wc -l

2020-02-05T11:29:44.364Z WARN main lotus/main.go:76 could not get API info:
github.com/filecoin-project/lotus/cli.GetRawAPI
/home/sky/lotus/cli/cmd.go:126


@nnserver - Did you try this step in the documentation? https://lotu.sh/en+join-testnet#note-using-the-lotus-node-from-china-24842

YES,I follow this tutorial from top to bottom,
Step by step