  Knowledge graph is a kind of valuable knowledge base which would benefit lots
of AI-related applications. Up to now, lots of large-scale knowledge graphs
have been built. However, most of them are non-Chinese and designed for general
purpose. In this work, we introduce TechKG, a large scale Chinese knowledge
graph that is technology-oriented. It is built automatically from massive
technical papers that are published in Chinese academic journals of different
research domains. Some carefully designed heuristic rules are used to extract
high quality entities and relations. Totally, it comprises of over 260 million
triplets that are built upon more than 52 million entities which come from 38
research domains. Our preliminary ex-periments indicate that TechKG has high
adaptability and can be used as a dataset for many diverse AI-related
applications. We released TechKG at: http://www.techkg.cn.
