OT: I visited a Chinese company last year in Beijing and what impressed me most was the richness of open source solutions there. To mention a few tools they were using that I haven't heard before: jstorm[1] (storm inspired stream processor) , dubbo [2] (grpc like for Java), codis [3] (redis clustering/sharding solution), canal [4] (mysql to Kafka forwarder).
Most of the code base of this company was java, go and PHP. And the comments were on Chinese and they were doing a task force to translate to English.