[7][8] However DZH was under investigation in April 2015 from the China Securities Regulatory Commission (CSRC) for information disclosure violations leading the deal to be terminated on 8 March 2016.

[2][8] On 4 December 2018, DZH sold its Hong Kong unit to Hundsun Technologies, a company controlled by Jack Ma.

[2] At the time of its listing, DZH had the highest market capitalization among its peers such as Hithink RoyalFlush Information Network and East Money.

[2] DZH also failed to control its expenses and made a large number of company acquisitions in a short period that lead to significant impairment of assets.

[2][9] Zhang was concerned that due to poor performance, DZH would be issued a delisting risk warning by adding "ST" to its stock code and therefore sought to falsely increase its profits.

Zhang was fined 300,000 yuan, banned from the securities industry for five years and had to step down from his position as chairman and CEO of the company.