My service is

centos-s-4vcpu-8gb-sgp1-01
Centos 7.6 x64
4 vCPUs 8GB / 160GB Disk ($40/mo)

My problem ... just one...
file download speed very slow......ㅠ

1. testing SGP1 ( 10Mb/s )
   http://speedtest-sgp1.digitalocean.com/

2. My Server ( 5.5Mb/9s => 0.6Mb/s )

Is there a workaround?