Grant of Options. Company hereby grants to Participant non-qualified stock options (“Options”) to purchase the number of shares of common stock of Company, par value $0.001 per share, set forth on the signature page to this Agreement (“Shares”), at the exercise price per Share set forth on the signature page to this Agreement (“Exercise Price”). The Options are not intended to qualify as incentive stock options under Section 422 of the Code.

Grant of Option. Subject to the terms and conditions set forth in this Agreement, the Company hereby grants to the Grantee a nonqualified stock option (the “Option”) to purchase up to 200,000 shares of Common Stock (“Shares”) at an exercise price of ​1 per Share (the “Strike Price”).

Grant of Option. Subject to the terms and conditions set forth in this Agreement, the Company hereby grants to the Grantee a nonqualified stock option (the “Option”) to purchase up to 300,000 shares of Common Stock (“Shares”) at an exercise price of ​1 per Share (the “Strike Price”).

Grant of Option. The Company grants to the Employee an option to purchase, on the terms and conditions stated herein, the number of shares specified above (the "Option Shares") of the Company's Common Stock, par value $0.32 per share (“Common Stock”) at the Option Price specified above.

This Nonstatutory Stock Option Agreement (the “Agreement”) evidences the grant by ​, ​ (the “Company”), on [ , 20 ] (the “Grant Date”) to ​, an employee, consultant or director of the Company (the “Participant”), of an option to purchase, in whole or in part, on the terms provided herein and in the Company’s 2015 Stock Incentive Plan (the “Plan”), a total of ​ shares (the “Shares”) of common stock, $0.01 par value per share, of the Company (“Common Stock”) at $​ per Share. Unless earlier terminated, this option shall expire at 5:00 p.m., Eastern time, on [ , 20 ] [date is ten years minus one day from grant date] (the “Final Exercise Date”).

This agreement evidences the grant by the Company, on the grant date (the “Grant Date”) set forth in the Notice of Grant that forms part of this agreement (the “Notice of Grant”), to the Participant of an option to purchase, in whole or in part, on the terms provided herein and in the Company’s 2021 Stock Incentive Plan (the “Plan”), the number of Shares set forth in the Notice of Grant of common stock, $0.001 par value per share, of the Company (“Common Stock”), at the exercise price per Share set forth in the Notice of Grant. Unless earlier terminated, this option shall expire at 5:00 p.m., Eastern time, on the Final Exercise Date set forth in the Notice of Grant (the “Final Exercise Date”).

Grant of Stock Options. On the Date of Hire, the Company will grant Employee non-qualified options to purchase 310,000 shares of the Company’s Common Stock, par value $.01 per share (the “Common Stock”), pursuant to the form of stock option agreement attached as [Exhibit A] to this Agreement, with the grant price set at the fair market value on the date of grant and subject to vesting in three equal annual installments (the “2015 Option Agreement”).

This agreement evidences the grant by the Company, on the grant date (the “Grant Date”) set forth in the Notice of Grant that forms part of this agreement (the “Notice of Grant”), to the Participant of an option to purchase, in whole or in part, on the terms provided herein and in the Company’s 2018 Equity Incentive Plan (the “Plan”), the number of Shares set forth in the Notice of Grant of common stock, $0.001 par value per share, of the Company (“Common Stock”), at the exercise price per Share set forth in the Notice of Grant. Unless earlier terminated, this option shall expire at 5:00 p.m., Eastern time, on the Final Exercise Date set forth in the Notice of Grant (the “Final Exercise Date”).

Grant of Option. ​ irrevocably grants to the Participant a Non‑Qualified Stock Option (hereinafter, the “Option”) representing the right to purchase all or any part of an aggregate of the number of shares specified in the grant summary of common stock, par value of US$5.00 per share, of ​ (“Common Stock”). This Option is granted pursuant to the ​ Compensation Plan for Non‑Employee Directors and the 2010 Master Stock Incentive Plan of ​ (collectively, the “Plan”). The Participant acknowledges receipt of a copy of the Plan. Capitalized terms not defined in this Agreement shall have the meaning ascribed to such terms in the Plan.

This agreement evidences the grant by the Company, on the grant date (the “Grant Date”) set forth in the Notice of Grant that forms part of this agreement (the “Notice of Grant”), to the Participant of an option to purchase, in whole or in part, on the terms provided herein and in the Company’s 2015 Equity Incentive Plan (the “Plan”), the number of Shares set forth in the Notice of Grant of common stock, $0.0001 par value per share, of the Company (“Common Stock”), at the exercise price per Share set forth in the Notice of Grant. Unless earlier terminated, this option shall expire at 5:00 p.m., Eastern time, on the Final Exercise Date set forth in the Notice of Grant (the “Final Exercise Date”).