EXHIBIT 99.1

AGREEMENT OF JOINT FILING

Pursuant to Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, the undersigned persons hereby agree to file with the Securities and Exchange Commission Schedule 13D (the "Schedule 13D") to which this Agreement is attached as an exhibit, and agree that such Schedule 13D, as so filed, is filed on behalf of each of them.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of December 10, 2018.

	GOLDEN PROPERTIES LTD.
	By:	/s/ Alexander Lau
	Name:	Alexander Lau
	Title:	Vice- President
	HUGO NEU CORPORATION
	By:	/s/ Wendy Joan Kelman-Neu
	Name:	Wendy Joan Kelman-Neu
	Title:	President
	TILLY LLC
	By:	/s/ Wendy Joan Kelman-Neu
	Name:	Wendy Joan Kelman-Neu
	Title:	Sole Member and Manager
	WENDY JOAN KELMAN-NEU
	/s/ Wendy Joan Kelman-Neu
	STEVEN KOHLHAGEN
	/s/ Steven Kohlhagen
	UPEN BHARWADA
	/s/ Upen Bharwada
	DONALD R. KENDALL
	/s/ Donald R. Kendall
	F. DANIEL GABEL
	/s/ F. Daniel Gabiel