Document:

Exhibit
10.16

 

Explanatory
Note: This document has been translated from the Chinese-language original for reference purposes only. While this English translation
is believed to be generally accurate, it is subject to, and qualified by, in its entirety, the Chinese-language original. Such Chinese-language
original shall be the controlling document for all purposes.

 

Purchase
Advance Payment Contract

 

Party
A (payer): Anhui Aokai Fa Grease Technology Co., Ltd.

Party
B (Payee): Wulongshan Family Farm of Tangchi Town, Shucheng County

 

Party
B is Party A’s raw material supplier. In order to reduce operating costs and enhance the partnership between the two parties, Party
A agrees to prepay certain prices for the purchase of corresponding raw materials for Party B’s obligation to provide Party A with
Camellia seeds. After full negotiation by both parties, the following contracts have been concluded:

 

1.
Purpose of advance payment: Party B can only use the advance payment paid by Party A to purchase camellia seed raw materials, and shall
not use it for other purposes.

 

2.
Prepaid amount: RMB 8,000,000

 

3.
As Party B’s business scope also involves Camellia seed oil, Party A may also provide Party B with Camellia seed oil of the same
value as the advance payment to offset the advance payment. The price of Camellia seed oil shall be in accordance with Party A’s
regulations.

 

4.
Repayment method: Party B will deduct the advance payment in the form of Camellia seeds or equivalent currency to Party A. The repayment
period shall not exceed twelve months per year, and special circumstances shall be negotiated separately.

 

5.
Party B promises to provide Party A with Camellia Seeds at a price that is 2% lower than the actual price of Camellia Seeds on the actual
delivery date. After the prepayment is deducted, the settlement will be based on the actual market price.

 

6.
If Party B fails to use the advance payment as required by the agreement, Party A has the right to recover the advance payment and impose
a penalty interest of three thousandths per day for the breached part.

 

7.
For matters not covered, the two parties can negotiate and conclude a supplementary contract. The supplementary contract has the same
legal effect as this contract. Any party who fails to negotiate can bring a lawsuit to the people’s court in China.

 

8.
This contract is valid for one year, and it will automatically terminate when it expires.

 

9.
This contract has two copies, with each party holding one copy, and it will take effect from the date of signing.

 

/s/
Anhui Aokai Fa Grease Technology Co., Ltd.

Party
A: Anhui Aokai Fa Grease Technology Co., Ltd.

Date:
May 15, 2020

 

/s/
Wulongshan Family Farm, Tangchi Town, Shucheng County

Party
B: Wulongshan Family Farm of Tangchi Town, Shucheng County

Date:
May 15, 2020Exhibit
10.17

 

Explanatory
Note: This document has been translated from the Chinese-language original for reference purposes only. While this English translation
is believed to be generally accurate, it is subject to, and qualified by, in its entirety, the Chinese-language original. Such Chinese-language
original shall be the controlling document for all purposes.

 

Purchase
Advance Payment Contract

 

Party
A (payer): Anhui Aokai Fa Grease Technology Co., Ltd.

Party
B (Payee): Yuyun Wang

 

Party
B is Party A’s raw material supplier. In order to reduce operating costs and enhance the partnership between the two parties, Party
A agrees to prepay certain prices for the purchase of corresponding raw materials for Party B’s obligation to provide Party A with
Camellia seeds. After full negotiation by both parties, the following contracts have been concluded:

 

1.
Purpose of advance payment: Party B can only use the advance payment paid by Party A to purchase camellia seed raw materials, and shall
not use it for other purposes.

 

2.
Prepaid amount: RMB 8,000,000

 

3.
As Party B’s business scope also involves Camellia seed oil, Party A may also provide Party B with Camellia seed oil of the same
value as the advance payment to offset the advance payment. The price of Camellia seed oil shall be in accordance with Party A’s
regulations.

 

4.
Repayment method: Party B will deduct the advance payment in the form of Camellia seeds or equivalent currency to Party A. The repayment
period shall not exceed twelve months per year, and special circumstances shall be negotiated separately.

 

5.
Party B promises to provide Party A with Camellia Seeds at a price that is 2% lower than the actual price of Camellia Seeds on the actual
delivery date. After the prepayment is deducted, the settlement will be based on the actual market price.

 

6.
If Party B fails to use the advance payment as required by the agreement, Party A has the right to recover the advance payment and impose
a penalty interest of three thousandths per day for the breached part.

 

7.
For matters not covered, the two parties can negotiate and conclude a supplementary contract. The supplementary contract has the same
legal effect as this contract. Any party who fails to negotiate can bring a lawsuit to the people’s court in China.

 

8.
This contract is valid for one year, and it will automatically terminate when it expires.

 

9.
This contract has two copies, with each party holding one copy, and it will take effect from the date of signing.

 

/s/
Anhui Aokai Fa Grease Technology Co., Ltd.

Party
A: Anhui Aokai Fa Grease Technology Co., Ltd.

Date:
May 20, 2020

 

/s/
Yuyun Wang

Party
B: Yuyun Wang

Date:
May 20, 2020Exhibit
10.18

 

Explanatory
Note: This document has been translated from the Chinese-language original for reference purposes only. While this English translation
is believed to be generally accurate, it is subject to, and qualified by, in its entirety, the Chinese-language original. Such Chinese-language
original shall be the controlling document for all purposes.

 

Purchase
Advance Payment Contract

 

Party
A (payer): Anhui Aokai Fa Grease Technology Co., Ltd.

Party
B (Payee): Yuhuan Wang

 

Party
B is Party A’s raw material supplier. In order to reduce operating costs and enhance the partnership between the two parties, Party
A agrees to prepay certain prices for the purchase of corresponding raw materials for Party B’s obligation to provide Party A with
Camellia seeds. After full negotiation by both parties, the following contracts have been concluded:

 

1.
Purpose of advance payment: Party B can only use the advance payment paid by Party A to purchase camellia seed raw materials, and shall
not use it for other purposes.

 

2.
Prepaid amount: RMB 8,000,000

 

3.
As Party B’s business scope also involves Camellia seed oil, Party A may also provide Party B with Camellia seed oil of the same
value as the advance payment to offset the advance payment. The price of Camellia seed oil shall be in accordance with Party A’s
regulations.

 

4.
Repayment method: Party B will deduct the advance payment in the form of Camellia seeds or equivalent currency to Party A. The repayment
period shall not exceed twelve months per year, and special circumstances shall be negotiated separately.

 

5.
Party B promises to provide Party A with Camellia Seeds at a price that is 2% lower than the actual price of Camellia Seeds on the actual
delivery date. After the prepayment is deducted, the settlement will be based on the actual market price.

 

6.
If Party B fails to use the advance payment as required by the agreement, Party A has the right to recover the advance payment and impose
a penalty interest of three thousandths per day for the breached part.

 

7.
For matters not covered, the two parties can negotiate and conclude a supplementary contract. The supplementary contract has the same
legal effect as this contract. Any party who fails to negotiate can bring a lawsuit to the people’s court in China.

 

8.
This contract is valid for one year, and it will automatically terminate when it expires.

 

9.
This contract has two copies, with each party holding one copy, and it will take effect from the date of signing.

 

/s/
Anhui Aokai Fa Grease Technology Co., Ltd.

Party
A: Anhui Aokai Fa Grease Technology Co., Ltd.

Date:
May 19, 2020

 

/s/
Yuhuan Wang

Party
B: Yuhuan Wang

Date:
May 19, 2020Exhibit 10.19

 

Explanatory Note: This document has been translated
from the Chinese-language original for reference purposes only. While this English translation is believed to be generally accurate, it
is subject to, and qualified by, in its entirety, the Chinese-language original. Such Chinese-language original shall be the controlling
document for all purposes.

 

Purchase Advance Payment Contract

 

Party A (payer): Anhui Aokai Fa Grease Technology Co., Ltd.

Party B (Payee): Zhenya Xu

 

Party B is Party A’s raw material supplier. In order to reduce
operating costs and enhance the partnership between the two parties, Party A agrees to prepay certain prices for the purchase of corresponding
raw materials for Party B’s obligation to provide Party A with Camellia seeds. After full negotiation by both parties, the following
contracts have been concluded:

 

1. Purpose of advance payment: Party B can only use the advance payment
paid by Party A to purchase camellia seed raw materials, and shall not use it for other purposes.

 

2. Prepaid amount: RMB 6,000,000

 

3. As Party B’s business scope also involves Camellia seed oil,
Party A may also provide Party B with Camellia seed oil of the same value as the advance payment to offset the advance payment. The price
of Camellia seed oil shall be in accordance with Party A’s regulations.

 

4. Repayment method: Party B will deduct the advance payment in the
form of Camellia seeds or equivalent currency to Party A. The repayment period shall not exceed twelve months per year, and special circumstances
shall be negotiated separately.

 

5. Party B promises to provide Party A with Camellia Seeds at a price
that is 2% lower than the actual price of Camellia Seeds on the actual delivery date. After the prepayment is deducted, the settlement
will be based on the actual market price.

 

6. If Party B fails to use the advance payment as required by the agreement,
Party A has the right to recover the advance payment and impose a penalty interest of three thousandths per day for the breached part.

 

7. For matters not covered, the two parties can negotiate and conclude
a supplementary contract. The supplementary contract has the same legal effect as this contract. Any party who fails to negotiate can
bring a lawsuit to the people's court in China.

 

8. This contract is valid for one year, and it will automatically terminate
when it expires.

 

9. This contract has two copies, with each party holding one copy,
and it will take effect from the date of signing.

 

/s/ Anhui Aokai Fa Grease Technology Co., Ltd.

Party A: Anhui Aokai Fa Grease Technology Co., Ltd.

Date: May 20, 2020

 

/s/ Zhenya Xu 

Party B: Zhenya Xu

Date: May 20, 2020

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