Here is the reply from Digital Ocean:
After review, we’re able to identify loss occurring at the ChinaNet Backbone Network, carrying through to the final location. Unfortunately, we are unable to make changes to our network infrastructure meaning that we’re limited in the actions that we can take to alleviate this impact. What may best help is to reach out to your ISP, sharing the MTR reports with them as well to see if they’re able to provide a remedy at their end or an upstream endpoint.