The memorandum, however, made no concrete commitments beyond an agreement to work together.
It sparked some controversy at the time because it was signed by Mayor John Carter and then chief executive Colin Dale before it could be debated by councillors. A council report said an "expedited process" was followed to avoid losing a possible major investment.
Councillors also wanted to know what the company expected in return for its investment.
Ms McInnes and Mr Vujcich will be joined in China by Andy Nock, chief executive of council-owned company Far North Holdings.
Mr Nock will already be in Beijing as part of a delegation led by Auckland Council's regional growth agency Auckland Tourism Events and Economic Development (Ateed). He is taking part in the Ateed trip to learn about Chinese businesses looking to invest in Northland and to showcase partnership opportunities with Far North Holdings.
Mr Carter said the trip would build on discussions the council had already held with the Chinese government through Tus-Holdings.
It was a chance to set out the council's expectations and vision for the Far North, while identifying "win-win" opportunities likely to create jobs and boost the district's income.
Due process would be followed and any important investment decisions would be clearly communicated with Maori and the wider public.
Under the agreement with Tus-Holdings the council would at least have some say over how money was invested in the Far North.
"For some time now there have been significant sales of land and businesses to Chinese and other overseas investors without us being aware. There is often no community involvement or input into these transactions," Mr Carter said.
"It's important that we continue the good relationship we've built with China over many years and also ensure that community well-being is always considered as these developments progress."
Tsinghua University is one of the top academic institutions in Asia. Tus-Holdings was set up in 2000 with assets that include the world's biggest university science park, TusPark (Beijing).