namecoin-core: can NOT sync in testnet

Hi,

When I start a namecoin node with testnet=1, it seems it can’t find a valid peer to sync. So is this testnet chain still valid? or if anyone could provide me a valid node, that will be great! VERSION: 0.16.3

2019-02-13 07:31:26 0 addresses found from DNS seeds 2019-02-13 07:31:26 dnsseed thread exit 2019-02-13 07:32:19 Adding fixed seed nodes as DNS doesn't seem to be available.

Thanks!