As of 05/10/2018, pursuant to Regulation on organization and management of UPCoM of HNX attached to Decision No.455/QD-SGDHN dated  20/6/2017 (Regulation on trading registration), HNX announced the additional reason for putting stock under trading restriction as follows:
- Issuer: Hung Long Mineral and Building Materials JSC
- Stock code: KHL
- Reason:  The Company violated the regulations on information disclosure on stock market (delayed disclosure Reviewed FS 2018 over 45 days  in accordance with the provisions of Point b, Clause 1, Article 31 and Point a, Clause 1, Article 32 of the Listing Regulations)
HNX will announce the approval for KHL to resume trading after the Company overcomes the reasons for being put under trading restriction pursuant to Regulation on trading registration.