Subsequent Events	9 Months Ended
Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent events	Note 19 – Subsequent events (i) Investment in JV On October 27, 2023, the Company entered into an equity purchase agreement with Highlight WFOE and Beijing Hehe, which was amended on November 10, 2023 (such equity purchase agreement, as amended, the “Agreement” for purpose of this section “Investment in JV”), pursuant to which the Highlight WFOE agreed to purchase 13.3333% equity interest in SH Xianzhui from Beijing Hehe and the Company agreed to issue 400,000 shares of common stock of the Company, valued at $2.7820 per share, the average closing bid price of the common stock of GDC as of the five trading days immediately preceding the date of the Agreement, to Beijing Hehe or its assigns. The closing of the transaction shall take place within thirty (30) days from the execution of the Agreement. The Agreement is effective for thirty (30) days from the date of the Agreement, which can be extended for additional thirty (30) days upon all parties’ written agreement. The Company or Highlight WFOE may terminate the Agreement at any time with a three (3) day advance written notice to Beijing Hehe. (ii) November 2023 Registered Direct Offering On November 1, 2023, the Company entered into a placement agency agreement (the “Placement Agency Agreement”), with Univest Securities, LLC (the “Placement Agent” or “Univest”). Pursuant to the Placement Agency Agreement, the Placement Agent agrees to use its reasonable best efforts to sell the Company’s common stock (the “Common Stock”) in a registered direct offering (the “Offering”). The Placement Agent has no obligation to buy any of the securities from us or to arrange for the purchase or sale of any specific number or dollar amount of securities. In the Offering, (i) an aggregate of 1,436,253 shares of common stock (the “Common Shares”) of the Company, par value $0.0001 per share, (ii) pre-funded warrants to purchase up to an aggregate of 1,876,103 shares of common stock (the “Pre-Funded Warrants”, and the common stock underlying such warrants, the “Pre-Funded Warrant Shares”), and (iii) registered warrants to purchase up to an aggregate of 3,312,356 shares of common stock (the “Registered Warrants”, and the common stock underlying such warrants, the “Registered Warrant Shares”) are sold to certain purchasers (the “Purchasers”), pursuant to a securities purchase agreement, dated October 31, 2023 (the “Securities Purchase Agreement”). The purchase price of each Common Share is $3.019. The purchase price of each Pre-funded Warrant is $3.018, which equals the price per Common Share being sold in this Offering, minus $0.001. The Pre-funded Warrants will be exercisable immediately after issuance and will expire five (5) years from the date of issuance. The Registered Warrants will be exercisable immediately and will expire five (5) years from the date of issuance. The Offering is being made pursuant to a shelf registration statement (No. 333-254366) on Form S-3, which was declared effective by the U.S. Securities and Exchange Commission (the “SEC”) on March 26, 2021, and related prospectus supplement. The net proceeds from the Offering, after deducting placement agent discounts and commissions and estimated offering expenses payable by the Company, are approximately $9.05 million (assuming the Registered Warrants are not exercised). The Company intends to use the net proceeds from the Offering for working capital and general corporate purposes. Pursuant to the Placement Agency Agreement, the Company has agreed to pay the Placement Agent a total cash fee equal to 7.0% of the aggregate gross proceeds received in the Offering. The Company also agreed to reimburse the Placement Agent certain out-of-pocket accountable expenses incurred in this Offering up to $150,000. In concurrent with the Offering, on November 1, 2023, the Company entered into certain warrant exchange agreements (the “Warrant Exchange Agreements”) with certain holders of warrants issued by the Company on May 16, 2023 in a private placement (the “Existing Warrants”), to purchase up to 1,154,519 shares of the Company’s Common Stock (the “Holders”). Pursuant to the Warrant Exchange Agreements, the Holders shall surrender the Existing Warrants, and the Company shall cancel the Existing Warrants and shall issue to Holders pre-funded warrants to purchase up to 577,260 shares of the Company’s Common Stock (the “Exchange Warrants”). The Exchange Warrants were issued to Holders on November 3, 2023 and the warrant exchange closed on the same day. On November 17, 2023, the Company entered into an amendment to the Securities Purchase Agreement with the Purchasers, pursuant to which Exhibit B to the Securities Purchase Agreement (form of Registered Warrants) was deleted and replaced with an amended and restated the Form of Registered Warrant, to remove Section 2(b) Adjustment Upon Issuance of Common Stock and Section 2(e) Other Events. The Registered Warrants that were issued to Purchasers under the Securities Purchase Agreement were returned to and cancelled by the Company on November 17, 2023. Concurrently, the Company issued amended and restated Registered Warrants to each Purchaser.

Subsequent Events

9 Months Ended

Sep. 30, 2023

Note 19 – Subsequent events

(i) Investment in JV

On October 27, 2023, the Company entered into an equity purchase agreement with Highlight WFOE and Beijing Hehe, which was amended on November 10, 2023 (such equity purchase agreement, as amended, the “Agreement” for purpose of this section “Investment in JV”), pursuant to which the Highlight WFOE agreed to purchase 13.3333% equity interest in SH Xianzhui from Beijing Hehe and the Company agreed to issue 400,000 shares of common stock of the Company, valued at $2.7820 per share, the average closing bid price of the common stock of GDC as of the five trading days immediately preceding the date of the Agreement, to Beijing Hehe or its assigns. The closing of the transaction shall take place within thirty (30) days from the execution of the Agreement. The Agreement is effective for thirty (30) days from the date of the Agreement, which can be extended for additional thirty (30) days upon all parties’ written agreement. The Company or Highlight WFOE may terminate the Agreement at any time with a three (3) day advance written notice to Beijing Hehe.

(ii) November 2023 Registered Direct Offering

On November 1, 2023, the Company entered into a placement agency agreement (the “Placement Agency Agreement”), with Univest Securities, LLC (the “Placement Agent” or “Univest”). Pursuant to the Placement Agency Agreement, the Placement Agent agrees to use its reasonable best efforts to sell the Company’s common stock (the “Common Stock”) in a registered direct offering (the “Offering”). The Placement Agent has no obligation to buy any of the securities from us or to arrange for the purchase or sale of any specific number or dollar amount of securities.

In the Offering, (i) an aggregate of 1,436,253 shares of common stock (the “Common Shares”) of the Company, par value $0.0001 per share, (ii) pre-funded warrants to purchase up to an aggregate of 1,876,103 shares of common stock (the “Pre-Funded Warrants”, and the common stock underlying such warrants, the “Pre-Funded Warrant Shares”), and (iii) registered warrants to purchase up to an aggregate of 3,312,356 shares of common stock (the “Registered Warrants”, and the common stock underlying such warrants, the “Registered Warrant Shares”) are sold to certain purchasers (the “Purchasers”), pursuant to a securities purchase agreement, dated October 31, 2023 (the “Securities Purchase Agreement”). The purchase price of each Common Share is $3.019. The purchase price of each Pre-funded Warrant is $3.018, which equals the price per Common Share being sold in this Offering, minus $0.001. The Pre-funded Warrants will be exercisable immediately after issuance and will expire five (5) years from the date of issuance. The Registered Warrants will be exercisable immediately and will expire five (5) years from the date of issuance.

The Offering is being made pursuant to a shelf registration statement (No. 333-254366) on Form S-3, which was declared effective by the U.S. Securities and Exchange Commission (the “SEC”) on March 26, 2021, and related prospectus supplement.

The net proceeds from the Offering, after deducting placement agent discounts and commissions and estimated offering expenses payable by the Company, are approximately $9.05 million (assuming the Registered Warrants are not exercised). The Company intends to use the net proceeds from the Offering for working capital and general corporate purposes.

Pursuant to the Placement Agency Agreement, the Company has agreed to pay the Placement Agent a total cash fee equal to 7.0% of the aggregate gross proceeds received in the Offering. The Company also agreed to reimburse the Placement Agent certain out-of-pocket accountable expenses incurred in this Offering up to $150,000.

In concurrent with the Offering, on November 1, 2023, the Company entered into certain warrant exchange agreements (the “Warrant Exchange Agreements”) with certain holders of warrants issued by the Company on May 16, 2023 in a private placement (the “Existing Warrants”), to purchase up to 1,154,519 shares of the Company’s Common Stock (the “Holders”). Pursuant to the Warrant Exchange Agreements, the Holders shall surrender the Existing Warrants, and the Company shall cancel the Existing Warrants and shall issue to Holders pre-funded warrants to purchase up to 577,260 shares of the Company’s Common Stock (the “Exchange Warrants”). The Exchange Warrants were issued to Holders on November 3, 2023 and the warrant exchange closed on the same day.

On November 17, 2023, the Company entered into an amendment to the Securities Purchase Agreement with the Purchasers, pursuant to which Exhibit B to the Securities Purchase Agreement (form of Registered Warrants) was deleted and replaced with an amended and restated the Form of Registered Warrant, to remove Section 2(b) Adjustment Upon Issuance of Common Stock and Section 2(e) Other Events.

The Registered Warrants that were issued to Purchasers under the Securities Purchase Agreement were returned to and cancelled by the Company on November 17, 2023. Concurrently, the Company issued amended and restated Registered Warrants to each Purchaser.