AGREEMENT OF JOINT FILING

EXHIBIT B

AGREEMENT OF JOINT FILING

The parties listed below agree that the amendment of Schedule 13D to which this agreement is attached as an exhibit (including any amendments thereto signed by the parties to this joint filing agreement), shall be filed on behalf of each of them. This Agreement is intended to satisfy Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in any number of counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Dated: May 23, 2022

[Signature Page to Joint Filing Agreement]

	Blue Ocean Structure Investment Co Ltd
	By:	/s/ Xxxxxxxx Xxxx
	Name: Xxxxxxxx Xxxx
	Title: Director
	Nanjing Xxxx Xxxx Xxx Xxxx Medical Industry Investment Partnership (Limited Partnership)
	By:	/s/ Xxx Xxxx
	Name: Xxx Xxxx
	Title: Authorized Signatory
	Nanjing Xxxx Xxxx Asset Management Co., Ltd.
	By:	/s/ Xxx Xxxx
	Name: Xxx Xxxx
	Title: Executive Director
	XXXXX XXXX
	By:	/s/ Xxxxx XXXX
	Name: Xxxxx XXXX
	Dendreon Pharmaceuticals LLC
	By:	/s/ Xxxx Xxxxx
	Name: Xxxx Xxxxx
	Title: Chief Executive Officer
	Nanjing Xinjiekou Department Store Co., Ltd.
	By:	/s/ Xxxxxxx Xxxx
	Name: Xxxxxxx Xxxx
	Title: Chairman of the Board
	Sanpower Group Co., Ltd.
	By:	/s/ Xxxxx Xxxx
	Name: Xxxxx Xxxx
	Title: Chairman of the Board